Software Engineer 2 (Java / Kotlin) - Allegro Merchant AI Assistant

🏢 Summary: Join a Product Catalog engineering team to build and optimize duplicate-detection and product-grouping solutions at scale. The role focuses on backend services, APIs, automation, and architecture in a JVM and public-cloud environment, with hybrid work in Toruń and a salary range of PLN 14,600–20,825. 🗂️ Requirements: Commercial Kotlin experience, Backend architectural patterns, Polish proficiency — C1, English proficiency — B2 📃 Skills: Java, Kotlin, JVM, APIs, Kubernetes, Docker, Consul, GitHub, Hermes, Cloud 🏢 Description: About the job In this role, you will be a key player in evolving the Product Catalog — the foundational pillar of the platform. Your primary objective will be to build and optimize solutions for duplicate detection and accurate product grouping across a broad portfolio of system components. Your work will directly shape the daily experience of users. You will ensure buyers enjoy a high-quality, clutter-free shopping experience while helping partners list their products more efficiently. Expect to tackle technical challenges at scale, working with online JVM services and offline processing in a public-cloud environment. Important things for you • Flexible working hours in a hybrid 4/1 model; working hours start between 7:00 a.m. and 10:00 a.m. • 30 days of occasional remote work. • Salary range, depending on skill set: PLN 14,600–20,825 (employment contract, tax-deductible cost). • Annual bonus based on annual performance and company results. • The team is based in Toruń. What You'll Do • Design, develop, test, and maintain high-quality code for backend services, APIs, and automation scripts. • Debug and resolve software defects and issues. • Design and develop new project architectures and propose improved architectural approaches for existing solutions. • Share knowledge with team members and support junior engineers. • Collaborate with product managers, data analysts, UX designers, and fellow engineers to gather and refine requirements. • Support on-call engineers by participating in the Software Engineer on-call rotation. • Write clean, efficient, and well-documented code. We are looking for someone who has • Solid commercial experience in Kotlin development and a strong command of backend architectural patterns. • Polish language proficiency at C1 level and English language proficiency at B2 level. • Excellent problem-solving and decision-making skills, paired with a data-driven mindset. • High learning agility, adaptability to change, flexibility, and strong communication and cooperation skills. What's in it for you • Well-located offices with fully equipped kitchens, bicycle parking, green terraces, and excellent work tools, including raised desks, ergonomic chairs, and interactive conference rooms. • A 16-inch or 14-inch MacBook Pro, or a corresponding Dell with Windows, plus necessary accessories. • A cafeteria plan with benefits such as medical, sports, or lunch packages, insurance, and purchase vouchers. • Employer-paid English classes related to the specific nature of the job. • A training budget, inter-team tourism, hackathons, and an internal learning platform with multiple trainings. • An additional day off for volunteering, individually or with a team or group. • Social events, including Spin Kilometers, Family Day, Fat Thursday, and Advent of Code. #goodtobehere means that • You will join a team of specialists who share knowledge and experience. • You will have autonomy in team organization, room for continuous development, and opportunities to try new things. • You can choose the technology that solves the problem and take responsibility for what you create. • You will work with a developer platform and tools that make software creation easier. • The internal ecosystem is based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. • You will have modern AI tools to automate repetitive tasks and support the development and refinement of services. • You will create solutions used by millions of customers. • You will work at scale with over 1,000 microservices, the open-source Hermes data bus handling 300K+ requests per second, a service mesh handling 1M+ requests per second, tens of petabytes of data, and production machine learning. • You will have opportunities to participate in industry conferences, tech communities, blogs, podcasts, guilds, and an internal technology conference.

🏢 Summary: Software/DevOps Engineer role focused on developing and maintaining internal developer tools and infrastructure that power the software delivery lifecycle. The position combines Java/Kotlin microservices development with large-scale Linux system administration, CI/CD optimization, and infrastructure automation. You will improve and scale platform solutions used by hundreds of engineers across the organization. 🗂️ Requirements: Proficiency in Java and/or Kotlin, Strong Linux system administration skills, Experience with CI/CD pipelines and GitHub, Experience with automation and Infrastructure as Code, Knowledge of containerization and orchestration concepts, Ability to manage systems at scale, English proficiency at B2+ level 📃 Skills: Java, Kotlin, Linux, GitHub, CI/CD, Ansible, IaC, Kubernetes, Docker, Consul, MongoDB 🏢 Description: Software Engineer 2 (Java / Kotlin) - Platform Team Location: Poznań, PL, 61-569 Company: Allegro sp. z o.o. Team: Technology Contract Type: Employee Important things for you Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 14 200 - 20 200 Annual bonus based on your annual performance and company results. Our team is based in Poznań. About the job Allegro’s development teams boast more than 1700 IT experts solving problems at a unique scale and complexity. However, if you join us, you’ll be joining a specific team that operates like a small, agile startup within our large organization. Our team is strongly Developer Experience (DevEx) driven, focusing on the core tools and components  that powers Allegro's software delivery lifecycle. We maintain the very heartbeat of our development process: from managing a massive selfhosted runners cluster and administrating Github enterprise to building tools that define how we build and release code. We are looking for a Software/DevOps Engineer who enjoys the intersection of software engineering and infrastructure, ensuring that our SDLC is fast, reliable, and scalable. We are a versatile team with diverse competencies, handling everything from our own Java/Kotlin microservices (backed by MongoDB ) to maintaining a central library that serves as the essential bridge between developers and our infrastructure. We are passionate about our internal users - the dozens of engineers who rely on our tools every day - and we work closely with them to ensure that CI/CD processes , from the first line of code  to final deployment, are a seamless experience. You’ll be joining a group where you can have a direct, daily impact on how hundreds of releases are handled across the company. We are looking for people who: Code in Java and / or Kotlin Are proficient in Linux and feel at home managing systems that operate at a massive scale Expect work that has a deeper meaning (not only tasks "management has commissioned") and want to enjoy its results Want to be proud of the code they create. They eagerly accept comments and share knowledge during code reviews Believe that "manual" is a bug – you automate everything (ex. using Ansible) and follow the Infrastructure as Code (IaC) philosophy Can look for effective solutions that solve business and technical challenges Can navigate GitHub and know how to build efficient, developer-friendly environments for  CI/CD pipelines Want to expand their skills into containerization and orchestration to help us build even more portable and resilient systems Want to constantly develop and update their knowledge, not only regarding software, but also in other domains like Big Data depending on clients needs Know English at B2+ level What’s in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 Summary: Build and operate high-performance backend and ML-enabled advertising systems for a large real-time marketplace. The role offers end-to-end ownership of cloud-native microservices, data-processing infrastructure, and new product development in a hybrid work model. 🗂️ Requirements: Kotlin or Scala, Spring Boot, Kafka, Backend systems experience, English B2 or higher 📃 Skills: Java, Kotlin, Scala, Spring, Kafka, Kubernetes, BigQuery, Spark, GCP, Docker, Consul, GitHub, Hermes 🏢 Description: About the job Join the Advertising team to build Allegro Ads, one of the platform’s most visible products. The team works closely with the Machine Learning team to create a strong customer experience, with a focus on high performance and engineering best practices. Massive Scale • Design, build, and optimize systems that handle thousands of requests per minute in a high-availability, high-performance environment. Modern Tech Stack • Work in a cloud-native environment using Kotlin, Spring, Kafka, and Kubernetes. • Work with machine learning technologies. True Ownership & Autonomy • Join an agile, autonomous team with full ownership of microservices, from design through deployment, following a “you build it, you run it” philosophy. Complex Challenges • Solve backend challenges involving distributed systems, data streaming, and algorithmic optimization for a large, real-time marketplace. End-to-End ML Systems • Build infrastructure with BigQuery and Apache Spark for offline data processing. • Integrate these components with the microservices architecture to create an advertising system that delivers a personalized user experience. Important things for you • Flexible working hours in a hybrid 4/1 model, with start times between 7:00 a.m. and 10:00 a.m. • 30 days of occasional remote work. • Salary range: PLN 11,200–15,250, depending on skills (employment contract, tax-deductible costs). • Annual bonus based on individual performance and company results. We are looking for people who • Code in Kotlin or Scala and have experience with Spring Boot and Kafka to build robust backend systems. • Value high-quality code reviews and substantive discussions on software-engineering best practices. • Are excited about building new products and launching fresh projects. • Develop soft skills through code reviews, pair programming, and team retrospectives. • Are open to using AI coding assistants to improve efficiency and focus on complex problem-solving. • Can find effective solutions to user requirements. • Continuously develop and update their knowledge. • Are enthusiastic about AI and technical innovation. • Want to influence the technical vision and shape new projects. • Are eager to learn and experiment with modern cloud infrastructure, including GCP, Docker, Kubernetes, and AI. • Know English at B2 level or higher. What's in it for you • Well-equipped offices, including kitchens, bicycle parking, green terraces, raised desks, ergonomic chairs, and interactive conference rooms. • A 16-inch or 14-inch MacBook Pro, or a corresponding Dell with Windows, plus required accessories. • Cafeteria-plan benefits, such as medical, sports, lunch packages, insurance, and purchase vouchers. • Job-related English classes. • Training budget, inter-team tourism, hackathons, and an internal learning platform. • An additional day off for volunteering. • Social events, including Spin Kilometers, Family Day, Fat Thursday, and Advent of Code. Working environment • Work with a team of specialists who share knowledge and experience. • High autonomy in team organization, continuous development, and experimentation with new solutions. • Choose technologies that solve problems and take responsibility for created solutions. • Use an internal self-service ecosystem and tools including Kubernetes, Docker, Consul, GitHub, and GitHub Actions. • Use AI tools to automate repetitive tasks and focus on new and existing services. • Build solutions used by millions of customers. • Work at scale with more than 1,000 microservices, the open-source Hermes data bus handling 300K+ requests per second, a Service Mesh handling 1M+ requests per second, tens of petabytes of data, and production machine learning.

🏢 Summary: Design and develop high-performance, cloud-native backend systems powering large-scale search and recommendation services. Work in an autonomous team owning microservices end-to-end in a distributed, real-time marketplace environment. Solve complex challenges in data streaming, search optimization, and machine learning at massive scale. 🗂️ Requirements: Proficiency in Kotlin or Java, Experience with backend development, Understanding of distributed systems, Experience with microservices architecture, Ability to design high-performance systems, English B2 level or higher, Participation in code reviews, Ownership of services from design to deployment 📃 Skills: Java, Kotlin, Spring, Kafka, Kubernetes, Vespa, Lucene, Solr, Docker, Consul, GitHub, GitHubActions, Microservices, DistributedSystems, MachineLearning, LLM, LoRA, PEFT, LangChain, AutoGen, CrewAI 🏢 Description: Senior Software Engineer (Java / Kotlin) Location: Poznań, PL, 61-569 Company: Allegro sp. z o.o. Team: Technology Contract Type: Employee About the job Massive Scale : Design, build, and optimize systems that handle thousands of requests per second. This is high-availability, high-performance engineering in practice. Modern Tech Stack : Work with a world-class, cloud-native environment. Our core technologies include Kotlin, Spring, Kafka, and Kubernetes. On the back side, there is Vespa and a highly optimized and heavily customized Lucene/Solr installation. We're not shy when it comes to ML too :) True Ownership & Autonomy : We live by a "you build it, you run it" philosophy. You'll join an agile, autonomous team with full ownership of your microservices, from design to deployment; and improvements are dictated by results of our own experiments. Complex Challenges : From distributed systems and data streaming to algorithmic optimization, you'll tackle the complex backend problems that power a massive, real-time marketplace. And a constantly modernizing approach to search solutions will give you the opportunity to work with advanced embedding and ranking models and pipelines. In our domain we focus on delivering search results for multiple Allegro services, from search result pages, to recommendations, to offers comparisons in various placements. We maintain a critical entry point for users’ search experience through a huge catalog of products and offers, striving for relevancy first. To deliver, we are designing, implementing and operating an extensive system combining modern microservice architecture with high performance backends and vast data sources. We care about data quality and availability and strive for near real-time accuracy, to best guide users to products and offers in a highly dynamic marketplace. Important things for you: Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 18 400 - 25 450 Annual bonus based on your annual performance and company results. Long term discretionary incentive plan based on Allegro.eu shares (restricted stock units). Our team is based in Poznań. We are looking for people who: Code in Kotlin or Java ; Expect work that requires creative approach to search experience challenges, to be proud of enjoying its results together with all Allegro users; Want to create solid code, eagerly accept comments and share knowledge during code reviews; Can look for effective solutions to the requirements set by users; Want to constantly develop and update their knowledge; Know English at at least B2 level. Nice to have: You are open to diverse technologies and workflows, including dev-operational tools on one hand, and working with data on the other. Basic experience with LLM tuning (LoRA, PEFT), training and evaluation pipelines for models and/or basic frameworks for building AI Agents (LangChain, AutoGen, CrewAI) would be great! What's in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 Summary: Technical role focused on designing and optimizing AI-driven backend systems for a conversational marketplace assistant, with strong emphasis on LLM orchestration, Retrieval-Augmented Generation, and semantic search. The position involves building and operating high-availability Python-based AI microservices integrated with Java/Kotlin services in a cloud-native environment. You will own end-to-end development of scalable, low-latency AI solutions leveraging modern ML and vector search technologies. 🗂️ Requirements: Proficiency in Python, Proficiency in Java, Proficiency in Kotlin, Experience with LLM orchestration, Experience with Retrieval-Augmented Generation (RAG), Experience with semantic search optimization, Ability to build and maintain microservices, Experience with cloud-native environments, Experience with vector databases and embedding models, English level B2 or higher 📃 Skills: Python, Java, Kotlin, Spring, LangChain, Langfuse, LLM, RAG, VectorSearch, Embeddings, Kubernetes, Docker, Consul, GitHub, GitHubActions, Microservices, SemanticSearch 🏢 Description: Software Engineer 2 (Python) Location: Poznań, PL, 61-569 Company: Allegro sp. z o.o. Team: Technology Contract Type: Employee About the job: Performance & Scale: Design, build, and optimize AI-driven systems that process complex natural language interactions. Delivering low-latency, high-quality responses from our AI Assistant requires high-availability and smart optimization of LLM and retrieval workloads in practice. Modern Tech Stack: Work with a world-class, cloud-native polyglot environment. Our core backend technologies include Java , Kotlin , Spring, and ADK . At the same time, our AI and orchestration layer heavily relies on Python . You will utilize Python and LangChain for complex LLM orchestration, alongside Langfuse for observability, prompt tracking, and evaluation. We leverage advanced vector search and modern ML solutions to make our assistant truly smart. True Ownership & Autonomy: We live by a "you build it, you run it" philosophy. You'll join an agile, autonomous team with full ownership of your AI microservices and data pipelines, from design to deployment; and improvements are dictated by results of our own experiments and AI evaluation metrics. Complex Challenges: From LLM orchestration and Retrieval-Augmented Generation (RAG) to semantic search optimization, you'll tackle the complex backend problems that power a conversational marketplace assistant. You will work across the Java/Kotlin and Python ecosystems, integrating advanced embedding models, prompt pipelines, and vector databases to ensure our AI deeply understands and accurately retrieves information. In our domain, we focus on delivering the core search and retrieval capabilities for the Allegro AI Assistant. We maintain a critical entry point for users looking to discover products, compare offers, and get personalized recommendations through natural conversations. Striving for relevancy and accuracy first, we are designing, implementing, and operating an extensive system combining modern microservice architecture with Large Language Models, high-performance retrievers, and vast data sources. We care about data quality, robust context building, and near real-time accuracy to best guide users through a highly dynamic marketplace via an intelligent, conversational interface. Important things for you: Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 14 200 - 20 200 Annual bonus based on your annual performance and company results. Our team is based in Poznań. We are looking for people who: Code in Python, Java and Kotlin ; Expect work that requires creative approach to search experience challenges, to be proud of enjoying its results together with all Allegro users; Want to create solid code, eagerly accept comments and share knowledge during code reviews; Can look for effective solutions to the requirements set by users; Want to constantly develop and update their knowledge; Know English at at least B2 level. Nice to have: You are open to diverse technologies and workflows, including dev-operational tools on one hand, and working with data on the other. Basic experience with LLM tuning (LoRA, PEFT), training and evaluation pipelines for models and/or basic frameworks for building AI Agents (Agent Development Kit, LangChain, AutoGen, CrewAI) would be great! What's in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 Summary: Software Engineer (Java/Kotlin) role focused on designing and scaling backend microservices for high-traffic business discount systems. The position involves owning architecture, building resilient cloud-based services, and delivering production-ready solutions in collaboration with product and UX. It requires hands-on coding, technical leadership, and ensuring reliability of critical systems at scale. 🗂️ Requirements: Proficiency in Java or Kotlin, Experience with microservices architecture, Experience working in cloud environments, Ability to design scalable and resilient backend systems, Experience with backend service architecture and high transaction systems, Ability to manage code quality and technical debt, Experience with CI/CD and modern development workflows, English level B2 or higher 📃 Skills: Java, Kotlin, Microservices, Cloud, Kubernetes, Docker, Consul, GitHub, GitHubActions, ServiceMesh, Hermes, CI/CD 🏢 Description: Allegro Business is growing fast and we are changing how companies buy online.  We are building discount systems with an architecture capable of handling massive scale, which is crucial for acquiring clients in the Small and Medium Enterprises. We need a Software Engineer (Java/Kotlin)  who can jump straight into the action, take ownership of critical ongoing projects and help build the best product. No corporate fluff - just real engineering challenges and high impact. About the job Own the architecture: You will design and scale backend services capable of handling complex business accounts and high transaction volumes. Lead & mentor: You’ll set the bar for code quality, manage tech debt and share knowledge. Ship real product: You’ll collaborate directly with Product Manager and UX Designer to turn complex requirements into clean, working software. Keep it rock-solid: You’ll ensure our critical services run smoothly and reliably (and yes, help us keep our on-call rotation healthy). Important things for you: Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN gross 14 600 - 20 825 Annual bonus based on your annual performance and company results. Our team is based in Kraków and Warsaw. We are looking for someone who : Code in Kotlin or Java and are excited to master Kotlin in a production environment. Are open to diverse technologies, including Frontend (but you don’t need to be a React master:)) Want to be proud of the code they create: they value high-quality code reviews and engage in substantive discussions on software engineering best practices; Feel comfortable interacting with stakeholders and taking full end-to-end ownership of initiatives - from initial requirements gathering through implementation to post-deployment monitoring; Have a solid foundation in microservices architecture and feel at home working in cloud environments, understanding how to build scalable and resilient systems; Know English at at least B2 level. What's in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale, which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 Summary: Backend Software Engineer role focused on designing and evolving large-scale logistics and location intelligence systems. The position involves building and optimizing high-volume data processing solutions, ensuring system scalability, reliability, and architectural excellence. You will take ownership of mission-critical services operating at massive scale within a microservices ecosystem. 🗂️ Requirements: Strong backend development experience with Kotlin, Experience designing scalable software architecture, Experience with high-volume data processing systems, Ability to design and maintain microservices-based systems, Experience monitoring system health and performance metrics, Ability to refactor and optimize complex systems, English proficiency at B2+ level, Willingness to participate in off-hours duty 📃 Skills: Kotlin, Architecture, Backend, Microservices, Scalability, DataProcessing, Kubernetes, Docker, Consul, GitHub, GitHubActions, Hermes, ServiceMesh, Monitoring, Metrics, Geodata, MachineLearning, AI, English 🏢 Description: Important things for you: Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 14 600 - 20 825 Annual bonus based on your annual performance and company results. Our team is based in Warsaw. About the Job Allegro is home to 2,500+ tech experts, but our team? We’re the ones ensuring the physical reality of e-commerce runs flawlessly. We are the driving force behind the Logistics platform, focusing on the massive-scale ecosystem. Our strategic imperative is vital: ensuring business continuity and total platform independence. We are building systems robust and scalable enough to instantly absorb our total traffic volume. We’re currently tackling scale challenges by evolving how we manage system capacity and traffic routing. As we expand our network of external logistics partners, we are refactoring our architecture to process hundreds of millions of records, accurately predict system load, and optimize volume distribution. But we’re not just moving parcels. We are also defining and executing a unified, cross-organizational location intelligence strategy - moving beyond ad-hoc solutions to standardize geo-data and optimize how we handle addressing at a massive scale. If you hate fragile systems, have a deeply analytical mindset, and want to build logistics infrastructure that thrives under pressure - you’re in the right place. The Role We are looking for a Software Engineer 2 with a strong background in back-end programming ( Kotlin ) and software architecture who is ready to lead structural improvements in high-volume data processing software and location intelligence. You will be taking ownership of complex systems where your decisions directly impact our operational efficiency. Your day-to-day will involve everything from designing scalable system architecture and tackling complex technical challenges, to writing high-quality code and ensuring the stability of core software products. Because our systems are mission-critical, you will also monitor core system health and operational metrics, ensuring high performance, data accuracy, cost-efficiency and you will participate in off-hours duty for team products. We are looking for people who: Are Architecture-Minded : Possess a strong background in back-end coding (Kotlin) and software architecture to design reliable, high-performance systems for massive-scale data. Seek Impact : Desire work with measurable results, focusing on building resilient logistics ecosystems and ensuring flawless operational smoothness across markets. Value Craftsmanship : Take pride in their code, actively manage technical debt, create clear documentation, and mentor less experienced team members. Are Problem Solvers : Find effective solutions for complex challenges, weighing trade-offs between custom and 3rd-party software and integrating solutions smoothly. Embrace Complexity : Navigate tasks from well-defined to ambiguous, bridging technical expertise and logistics domain knowledge for optimal architectural decisions. Are Life-long Learners : Continuously develop their knowledge, staying up-to-date with advancements in back-end architecture, high-volume data processing, and logistics operations. Communicate Effectively : Know English at a B2+ level and can clearly translate complex technical concepts to technical and non-technical stakeholders. What’s in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 2000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 Summary: The offer is for a Software Engineer 2 focused on backend development in Kotlin, working on large-scale logistics and delivery selection systems handling tens of thousands of requests per second. The role centers on designing scalable architectures, improving high-volume data processing, and ensuring reliability of mission-critical services. You will own complex systems impacting operational efficiency and platform resilience. 🗂️ Requirements: Strong background in backend development with Kotlin, Experience in software architecture and scalable system design, Experience with high-volume data processing systems, Ability to monitor system health and operational metrics, Willingness to participate in off-hours duty, English proficiency at B2+ level 📃 Skills: Kotlin, Kubernetes, Docker, Consul, GitHub, GitHubActions, AI, Microservices 🏢 Description: About the Job Allegro is home to 2,500+ tech experts, but our teams? They’re the ones ensuring the physical reality of e-commerce runs flawlessly. We are looking for engineers who want to solve large-scale challenges in areas critical to the Allegro shopping journey and logistics platform - from delivery selection to the systems powering order fulfillment at massive scale. Logistics Platform & Location Intelligence This team is the driving force behind the Logistics platform, focused on the massive-scale ecosystem behind order fulfillment. Their strategic imperative is vital: ensuring business continuity and total platform independence by building systems robust and scalable enough to instantly absorb total traffic volume. They are currently tackling scale challenges by evolving how system capacity and traffic routing are managed, while expanding a network of external logistics partners. As they refactor the architecture to process hundreds of millions of records, accurately predict system load, and optimize volume distribution, they are also defining and executing a unified, cross-organizational location intelligence strategy — moving beyond ad-hoc solutions to standardize geo-data and optimize how addressing is handled at scale. Delivery Selection This team works on one of the most critical parts of the Allegro shopping journey: delivery selection. They build solutions that handle around 40k requests per second, deploy to production multiple times a day, and treat every change as an independent increment. Because without delivery selection no order can happen, they care deeply about code quality, automated testing, and reliability. At the same time, they invest in knowledge sharing, continuous development, and use AI in their daily work to support nearly every stage of building new features. If you hate fragile systems, have a deeply analytical mindset, and want to build infrastructure that thrives under pressure, you’ll be in the right place. The Role We are looking for a Software Engineer 2 with a strong background in back-end programming ( Kotlin ) and software architecture who is ready to lead structural improvements in high-volume data processing software and location intelligence. You will be taking ownership of complex systems where your decisions directly impact our operational efficiency. Your day-to-day will involve everything from designing scalable system architecture and tackling complex technical challenges, to writing high-quality code and ensuring the stability of core software products. Because our systems are mission-critical, you will also monitor core system health and operational metrics, ensuring high performance, data accuracy, cost-efficiency and you will participate in off-hours duty for team products. Important things for you: Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 14 600 - 20 825 Annual bonus based on your annual performance and company results. Our team is based in Warsaw. We are looking for people who: Possess a strong background in back-end coding (Kotlin) and software architecture to design reliable, high-performance systems for massive-scale data. Desire work with measurable results, focusing on building resilient logistics ecosystems and ensuring flawless operational smoothness across markets. Take pride in their code, actively manage technical debt, create clear documentation, and mentor less experienced team members. Find effective solutions for complex challenges, weighing trade-offs between custom and 3rd-party software and integrating solutions smoothly. Navigate tasks from well-defined to ambiguous, bridging technical expertise and logistics domain knowledge for optimal architectural decisions. Continuously develop their knowledge, staying up-to-date with advancements in back-end architecture, high-volume data processing, and logistics operations. Know English at a B2+ level and can clearly translate complex technical concepts to technical and non-technical stakeholders. What’s in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 2000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 Summary: Senior Software Engineer role focused on designing and optimizing high-availability, high-performance microservices in a cloud-native environment at massive scale. The position involves full ownership of backend services, working with Java/Kotlin, Big Data workflows, and distributed systems powering a real-time marketplace. You will build, deploy, and maintain scalable systems handling thousands of requests per minute. 🗂️ Requirements: Proficiency in Java or Kotlin, Willingness to work with Kotlin in production, Experience with microservices architecture, Experience with cloud environments, Knowledge of distributed systems, Experience with Big Data workflows, Ability to work with Airflow and BigQuery, Understanding of scalable and resilient system design, Ability to take end-to-end ownership of services, English level B2 or higher 📃 Skills: Java, Kotlin, Spring, MongoDB, Microservices, GCP, React, Airflow, BigQuery, Kubernetes, Docker, Consul, GitHub, GitHubActions 🏢 Description: Senior Software Engineer Location: Kraków, PL, 31-503 Company: Allegro sp. z o.o. Team: Technology Contract Type: Employee About the job Massive Scale : Design, build, and optimize systems that handle thousands of requests per minute. This is high-availability, high-performance engineering in practice. Modern Tech Stack : Work with a world-class, cloud-native environment (GCP). Our core technologies include Java, Kotlin, Spring, MongoDB, microservices, React, Airflow (BigData). True Ownership & Autonomy : We live by a "you build it, you run it" philosophy. You'll join an agile, autonomous team with full ownership of your microservices, from design to deployment. Complex Challenges : From distributed systems and data streaming to algorithmic optimization, you'll tackle the complex backend problems that power a massive, real-time marketplace. About us We are the team behind Allegro Prices - one of our most important pricing programs. As part of the Competitive Price unit, we build its logic and grow its reach to keep our prices competitive. Our main goal is to ensure great deals on the products that shoppers actually look for. We do this at scale using full automation and data from many different sources Important things for you Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 9:30 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 18 400 - 25 450 Annual bonus based on your annual performance and company results. Our team is based in Kraków and Warsaw. We are looking for people who: Code in Kotlin or Java and are excited to master Kotlin in a production environment. Are open to diverse technologies , including Frontend. You don’t need to be a React master, but you’re ready to mentor Frontend engineers on architectural patterns and help build a truly cross-functional team. Want to grow into Big Data , learning how to handle large-scale datasets and build workflows with Airflow and BigQuery . Want to be proud of the code they create ; they value high-quality code reviews and engage in substantive discussions on software engineering best practices; Feel comfortable interacting with stakeholders and taking full end-to-end ownership of initiatives - from initial requirements gathering through implementation to post-deployment monitoring; Have a solid foundation in microservices architecture and feel at home working in cloud environments , understanding how to build scalable and resilient systems; Know English at at least B2 level. What's in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 Summary: Software Engineer 2 role focused on designing and evolving high-volume backend systems for logistics platform and delivery selection, handling massive-scale data and traffic. The position involves leading architectural improvements, ensuring system reliability, and optimizing location intelligence and order fulfillment processes. The engineer owns mission-critical services operating at very high request rates and large data scale. 🗂️ Requirements: Strong experience in backend development with Kotlin, Experience designing scalable software architecture, Experience with high-volume data processing systems, Ability to design and maintain distributed systems, Experience with microservices-based architectures, Ability to monitor system health and performance metrics, Experience with traffic routing and capacity management, English proficiency at B2+ level 📃 Skills: Kotlin, Architecture, Microservices, Kubernetes, Docker, Consul, GitHub, GitHubActions, Hermes, ServiceMesh, AI, DataProcessing, LocationIntelligence, Monitoring 🏢 Description: About the Job Allegro is home to 2,500+ tech experts, but our teams? They’re the ones ensuring the physical reality of e-commerce runs flawlessly. We are looking for engineers who want to solve large-scale challenges in areas critical to the Allegro shopping journey and logistics platform — from delivery selection to the systems powering order fulfillment at massive scale. Logistics Platform & Location Intelligence This team is the driving force behind the Logistics platform, focused on the massive-scale ecosystem behind order fulfillment. Their strategic imperative is vital: ensuring business continuity and total platform independence by building systems robust and scalable enough to instantly absorb total traffic volume. They are currently tackling scale challenges by evolving how system capacity and traffic routing are managed, while expanding a network of external logistics partners. As they refactor the architecture to process hundreds of millions of records, accurately predict system load, and optimize volume distribution, they are also defining and executing a unified, cross-organizational location intelligence strategy — moving beyond ad-hoc solutions to standardize geo-data and optimize how addressing is handled at scale. Delivery Selection This team works on one of the most critical parts of the Allegro shopping journey: delivery selection. They build solutions that handle around 40k requests per second, deploy to production multiple times a day, and treat every change as an independent increment. Because without delivery selection no order can happen, they care deeply about code quality, automated testing, and reliability. At the same time, they invest in knowledge sharing, continuous development, and use AI in their daily work to support nearly every stage of building new features. If you hate fragile systems, have a deeply analytical mindset, and want to build infrastructure that thrives under pressure, you’ll be in the right place. The Role We are looking for a Software Engineer 2 with a strong background in back-end programming ( Kotlin ) and software architecture who is ready to lead structural improvements in high-volume data processing software and location intelligence. You will be taking ownership of complex systems where your decisions directly impact our operational efficiency. Your day-to-day will involve everything from designing scalable system architecture and tackling complex technical challenges, to writing high-quality code and ensuring the stability of core software products. Because our systems are mission-critical, you will also monitor core system health and operational metrics, ensuring high performance, data accuracy, cost-efficiency and you will participate in off-hours duty for team products. Important things for you: Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN 14 600 - 20 825 Annual bonus based on your annual performance and company results. Our team is based in Warsaw. We are looking for people who: Are Architecture-Minded : Possess a strong background in back-end coding (Kotlin) and software architecture to design reliable, high-performance systems for massive-scale data. Seek Impact : Desire work with measurable results, focusing on building resilient logistics ecosystems and ensuring flawless operational smoothness across markets. Value Craftsmanship : Take pride in their code, actively manage technical debt, create clear documentation, and mentor less experienced team members. Are Problem Solvers : Find effective solutions for complex challenges, weighing trade-offs between custom and 3rd-party software and integrating solutions smoothly. Embrace Complexity : Navigate tasks from well-defined to ambiguous, bridging technical expertise and logistics domain knowledge for optimal architectural decisions. Are Life-long Learners : Continuously develop their knowledge, staying up-to-date with advancements in back-end architecture, high-volume data processing, and logistics operations. Communicate Effectively : Know English at a B2+ level and can clearly translate complex technical concepts to technical and non-technical stakeholders. What’s in it for you: Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale , which starts with over 2000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!