Remote Scala Developer (Senior/Staff)

🏢 Summary: Remote Kafka-focused engineering role with high hourly remuneration, offering autonomy and flexible cooperation. The position centers on administering, tuning, and consulting on Apache Kafka solutions, including leading trainings and supporting pre-sales activities. Projects involve cloud-native environments using Kubernetes, Docker, and major cloud platforms. 🗂️ Requirements: Hands-on experience with Apache Kafka administration, Experience with Kafka performance tuning, Strong knowledge of Kafka ecosystem, Ability to deliver Kafka consulting and lead technical trainings, Experience with technical pre-sales activities, Experience with Kubernetes, Experience with Docker, Very good knowledge of Ansible, Experience with cloud deployments (AWS, GCP, or Azure) 📃 Skills: Kafka, Kubernetes, Docker, Ansible, AWS, GCP, Azure, Cloud 🏢 Description: Our cooperation offer: Remuneration ranging from 165 to 210 PLN net per hour for a start 100% remote company with remote-first mindset Flexible cooperation from any location and without strict schedule Professional development and freedom in choosing toolset and tech stack Learning-culture expressed by SoftwareMill Academy and technical reading clubs Access to many AI tools (Claude, OpenAI, Cursor, Gemini, Copilot, etc.) Leadership and soft-skills in-house trainings English courses Small to medium teams with as little procedures as possible Best tools you need to make our cooperation effective and pleasurable: monitor(s), computer of your choice DevOps-friendly environment with passionate and skilled people who believe in software craftsmanship - you will have a chance to meet some of them during the selection process Interesting projects with technologies like Docker, Kubernetes, AWS, GCP, Terraform, clustering and scaling both horizontally and vertically What we expect: Hands-on experience with Apache Kafka administration, performance tuning, and its ecosystem Ability to perform Kafka consulting and lead Kafka trainings Experience with technical pre-sales activities and direct communication with business stakeholders Autonomy in project delivery Readiness to represent SoftwareMill at global events (London Current, Kafka Summit, etc.) Readiness to conduct demos and workshops with customers, both online and on-site Experience with Kubernetes and Docker Very good knowledge about Ansible Experience with deployment to a cloud (AWS, GCP, Azure, etc.) Comprehensive knowledge and understanding of the industry trends Good knowledge of English is a must (both spoken and written), we cooperate with clients from all over the world (USA, Australia, Switzerland, etc.) Polish language is required, as internally we are a Polish speaking company Nice to have: Confluent Certified Administrator for Apache Kafka (CCAAK) and/or Confluent Certified Developer for Apache Kafka (CCDAK) Hands-on experience with Confluent Platform Very good knowledge about various IaC tools (Terraform, Pulumi, Amazon CDK) Experience with Grafana Experience with MLOps and/or DevSecOps Experience with JVM applications Management of multi-node clusters Experience in using AI in software development and deployment cycle Engagement in the IT community: personal blog, speaking at meetups/conferences, involvement in the open-source projects Having a pet-project

🏢 Summary: Senior/Expert Java Developer role in an international SaaS project focused on building new AI-driven functionality and modernizing backend systems. The position involves technical ownership, architecture design, and development of scalable microservices-based solutions in a hybrid work model. Candidates will work with Java, Spring Boot, AI technologies, and Microsoft Foundry in a dynamic consultancy environment. 🗂️ Requirements: 8+ years of experience as a Java Developer, Strong knowledge of Java stack, Experience with CI/CD, Experience with Docker, Experience with microservices, Experience building end-to-end solutions, Commercial experience with AI tools, Experience with Microsoft Foundry, Ability to design scalable and maintainable systems, Experience in software house or consultancy environment, Strong understanding of backend architectures, Knowledge of backend development best practices, Strong technical skills, Strong communication skills, Ability to work on multiple projects simultaneously 📃 Skills: Java, Spring, SpringBoot, SQL, Docker, Microservices, CICD, MicrosoftFoundry, AI, Cloud 🏢 Description: Salary: Senior 1000–1300 PLN net / MD Expert/Leader 1300-1600 PLN net / MD (if your financial expectations are higher and justified by your experience, please let us know - we are open to discussing it) Work model: Kraków / Gdańsk  / Warsaw - hybrid work model (2 days per week from the office) Start date: As soon as possible. We can wait up to 1 month if required due to a notice period. Why choose this offer? Real influence on technical decisions and system architecture Dynamic, project-driven environment with diverse challenges Developing new AI-based functionality Project International project focused on building new AI-driven functionality within a modern SaaS platform. This role offers the opportunity to take technical ownership, shape architecture decisions, and contribute to the development of innovative solutions leveraging modern AI technologies, including Microsoft Foundry . Responsibilities you'll have Take technical ownership of the project Design and architect end-to-end backend systems and solutions Supervise and ensure technical quality across projects Support project estimations, including effort, budget, and cost calculations Create and maintain technical designs and documentation Collaborate closely with delivery and business stakeholders Adapt to different client environments, expectations, and technical stacks Work on several projects simultaneously — multitasking is essential Expected competences and knowledge 8+ years of experience as a Java Developer Solid knowledge of the Java stack Solid familiarity with CI/CD , experience working with Docker and microservices Experience in building end-to-end solutions Commercial experience with AI tools Experience with Microsoft Foundry Strong technical and soft skills Proven ability to design scalable and maintainable systems Experience working in a software house / consultancy environment Very good understanding of backend architectures and development best practices Nice to have Experience with cloud platforms (from a developer perspective) Knowledge of modern infrastructure and deployment approaches Technologies you'll work with Java Spring Boot SQL Microsoft Foundry Docker Microservices CI/CD Cloud platforms Client – why choose this particular client from the Jit portfolio? Our client is a leading European SaaS provider specializing in cloud-based solutions for the insurance and pension sector. The cooperation focuses on platform modernization and the development of new AI-based functionality , combining modern technologies with real business impact. About Jit Team The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts , to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams. Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

🏢 Summary: The offer is for an AI Web Developer responsible for building and shipping AI-powered tools, automations, and full-stack solutions that directly impact marketing performance. The role focuses on rapid prototyping, integrating LLMs into real workflows, and unifying multiple brands into one technical ecosystem. It requires independent end-to-end product delivery in a fast-changing, low-process environment. 🗂️ Requirements: 2+ years of commercial programming experience, Experience building end-to-end web applications independently, Daily practical use of AI tools in development workflow, Ability to integrate LLMs into production solutions, Strong knowledge of modern web stack (Next.js, server components, backend basics), Experience deploying applications to production environments, Ability to automate workflows and integrate external tools, Experience working directly with non-technical stakeholders 📃 Skills: Next.js, JavaScript, TypeScript, LLM, Claude, GPT, Cursor, Vercel, Supabase, N8N, ElevenLabs, HTML, CSS, API, Git 🏢 Description: Location: Szczecin/Warsaw, remote, with the possibility of coming to the office from time to time Salary: PLN 15 000 - 20 000 net (B2B) About the role: We're looking for a builder, someone who sees a problem, picks up the right tools, and ships a solution before most people finish writing the ticket. You'll work at the intersection of AI, marketing, and frontend to helping us move faster, automate more, and eliminate manual work across multiple projects. As an AI Web Developer, you will: Building AI-powered tools, automations, and experiments that directly impact marketing results Turning ideas into working solutions fast: landing pages, internal tools, growth experiments, brand deployments Working with LLMs daily (Claude, GPT, Cursor, etc.) - prompting, iterating, shipping, not just exploring Unifying multiple brands into one consistent technical ecosystem (tools, flows, deployment pipelines) Eliminating manual work - if something is done by hand today, your job is to automate it tomorrow Integrating AI into real marketing workflows: content production, campaign tooling, partner platforms Biggest challenges in this role: Priorities change fast - often weekly, sometimes daily. There's no long-term backlog to hide behind You'll get business problems, not tickets. Figuring out the solution is part of the job Building fast without overengineering - knowing when "good enough and shipped" beats "perfect and pending" Working across multiple brands at different technical maturity levels Operating close to the CEO and other stakeholders when things move quickly and decisions happen in real time What you'll learn: How to build AI-powered products in a real business context - not demos, not side projects, things that generate leads and save money How to go from idea → shipped solution in days (we built a full partner academy platform in 3 days) How to use LLMs effectively to speed up every layer of your work (code, copy, research, decisions) How to work directly with marketing and make a measurable growth impact How to operate without hand-holding in a low-process, high-trust environment What you'll get to experiment with AI tools in real workflows: Cursor, Claude Code, v0, Stitch, ElevenLabs, and whatever comes out next week Full-stack product building - Vercel, Supabase, Next.js, AI layer on top Building internal tools that replace expensive SaaS platforms Rapid prototyping and killing your own ideas fast when they don't work You are the perfect fit, if you have: 2+ years of hands-on commercial programming experience You've built something for marketing and can explain what metric it was supposed to move and why that metric mattered You've built things end-to-end and can show them - not just contributed to someone else's project You use AI tools daily and have opinions on which ones are good for what (and why) You can go from idea → working product independently, without waiting for a spec Solid understanding of modern web stack - Next.js, server components, basic backend, deploying to production You know when to ask for help and when to just figure it out You can work directly with non-technical people (marketing, CEO) without losing momentum You'll stand out if you: Have your own side projects, experiments, or things you've shipped just to see if they work Have experience with Next.js and understand why you'd use them (not just how) Are comfortable with Vercel + Supabase stack or something comparable Have worked with or explored automation tools like N8N - understanding integrations and data flows is a plus Have experimented with ElevenLabs, AI video/content generation, or similar creative AI tools Can talk about AI tools critically - what works, what doesn't, and what you'd never use again (e.g. "I use Perplexity for research but Claude for content, because...") Have worked in a product company and understand what "business impact" actually means We would like to offer you: Salary up to PLN 20.000 under a B2B contract or an equivalent within the employment contract. Access to all major AI tools - and the freedom to pick the ones that work best. Direct impact on marketing results from day one. A team that ships fast and doesn't overthink process. A role with high influence and independence. Remote-first work with flexible hours. Possibility to use one of our offices in Poland. Great development opportunities – company-supported courses and conferences 26 days off guaranteed in a year Individual work tools —MacBook Pro, Dell screen, JBL headphones? You can tailor the equipment to your needs! Sport & wellness benefit Private medical care Mental well-being program – individual therapy sessions and resources for employees Free access to one of the most popular e-book/audiobook services Regular social events (company-wide offsites, team events) Budget for 1:1 English language classes Diversity Statement One of Tidio’s core values is to play fair. Therefore, we treat all candidates equally. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, or disability status. This means recruitment and selection of talent to Tidio is only based on individual merit and qualifications directly related to professional competence.

🏢 Summary: Hybrid developer role focused on transforming software development by embedding AI across the full SDLC. The position combines hands-on development (Java, .NET, or frontend/cloud) with building internal AI agents and automations to scale AI-driven practices across teams. The offer emphasizes real projects, measurable impact, and organization-wide AI adoption. 🗂️ Requirements: Active software developer, Strong expertise in Java or .NET or Frontend, Active daily use of AI tools in development, Understanding of full SDLC lifecycle, Ability to demonstrate measurable technical impact 📃 Skills: Java, .NET, Frontend, Cloud, AI, SDLC, Claude, Copilot, Cursor, Playwright, Agents, Automation, Prompting, Workflows 🏢 Description: Salary: 500 - 900 PLN net / MD Hybrid work: we expect a positive attitude toward working in a hybrid model . We can hire in any of our locations (Gdynia/Gdańsk, Warsaw, Rzeszów, Kraków) . Why choose this offer? A strong impact on how the entire organization works Work on real projects (not just POCs) More about this offer We are looking for a proactive developer who will help us transform the way we build software . We are creating an environment where most of the SDLC (analysis, UX, code, testing, documentation) is supported by AI (Claude Code, agents, automations). We already have teams working in this model — now we want to scale this approach across the entire organization. Requirements Active developer Strong expertise in one of the following ecosystems: Java / .NET / frontend - we expect any level of experience with these technologies Active use of AI in daily work (not just ChatGPT for “assistance”) Understanding of the SDLC end-to-end (analysis → production) Enjoyment of working with people and driving changes in how they operate Ability to demonstrate concrete impact: “I did X → result Y” Nice to have skills Experience with AI agents (e.g. Claude Code, Cursor, Copilot, etc.) Test automation experience (e.g. Playwright) Experience in measuring team productivity Experience in building internal tools / platforms Duties Work as a developer (Java / .NET / frontend / cloud) Build internal AI-based solutions (agents, workflows, automations) Join teams and help them change the way they work: demonstrate how to use AI in daily tasks, support the implementation of specific practices (code, testing, analysis, UX) Measure effectiveness (time, quality, throughput) Report the level of AI adoption in teams (usage, impact, maturity) Create and maintain standards for working with AI (prompting, agents, memory, workflows) Share knowledge and help build an internal community About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Hybrid developer role focused on transforming the software development lifecycle through active use of AI tools and agents across real production projects. The position combines hands-on development (Java/.NET/frontend/cloud) with driving AI adoption, automation, and process optimization within teams. The role involves building internal AI-based solutions and scaling AI-supported SDLC practices organization-wide. 🗂️ Requirements: Active software developer, Strong expertise in Java or .NET or frontend ecosystem, Active daily use of AI tools in development workflow, Understanding of full SDLC from analysis to production, Ability to demonstrate measurable impact of work, Willingness to work in hybrid model 📃 Skills: Java, .NET, Frontend, Cloud, AI, Claude, Copilot, Cursor, Playwright, SDLC, Automation 🏢 Description: Salary: 1000-1300 PLN net / MD Hybrid work: we expect a positive attitude toward working in a hybrid model . We can hire in any of our locations (Gdynia/Gdańsk, Warsaw, Rzeszów, Kraków) . Why choose this offer? A strong impact on how the entire organization works Work on real projects (not just POCs) More about this offer We are looking for a proactive developer who will help us transform the way we build software . We are creating an environment where most of the SDLC (analysis, UX, code, testing, documentation) is supported by AI (Claude Code, agents, automations). We already have teams working in this model — now we want to scale this approach across the entire organization. Requirements Active developer Strong expertise in one of the following ecosystems: Java / .NET / frontend - we expect any level of experience with these technologies Active use of AI in daily work (not just ChatGPT for “assistance”) Understanding of the SDLC end-to-end (analysis → production) Enjoyment of working with people and driving changes in how they operate Ability to demonstrate concrete impact: “I did X → result Y” Nice to have skills Experience with AI agents (e.g. Claude Code, Cursor, Copilot, etc.) Test automation experience (e.g. Playwright) Experience in measuring team productivity Experience in building internal tools / platforms Duties Work as a developer (Java / .NET / frontend / cloud) Build internal AI-based solutions (agents, workflows, automations) Join teams and help them change the way they work: demonstrate how to use AI in daily tasks, support the implementation of specific practices (code, testing, analysis, UX) Measure effectiveness (time, quality, throughput) Report the level of AI adoption in teams (usage, impact, maturity) Create and maintain standards for working with AI (prompting, agents, memory, workflows) Share knowledge and help build an internal community About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.

🏢 Summary: Backend Engineer role in the Advertising team focused on building and operating high-availability, large-scale microservices and ML-powered systems. The position involves designing and optimizing distributed systems using a modern cloud-native stack (Kotlin, Spring, Kafka, Kubernetes) and integrating big data and machine learning components into a real-time marketplace. The offer includes hybrid work, competitive salary, annual bonus, and strong ownership within an autonomous agile team. 🗂️ Requirements: Proficiency in Kotlin or Java, Willingness to work with Kotlin in greenfield projects, Experience with backend development and microservices, Ability to design and optimize high-performance, distributed systems, Experience with cloud-native technologies, Understanding of data processing and system integration, English proficiency at B2 level or higher 📃 Skills: Kotlin, Java, Spring, Kafka, Kubernetes, BigQuery, Spark, Docker, Consul, GitHub, GitHubActions, MachineLearning, Microservices 🏢 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 11 200 - 15 250 Annual bonus based on your annual performance and company results. Our team is based in Poznań. 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. Our core technologies include Kotlin, Spring, Kafka, and Kubernetes. 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. 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. End-to-End ML Systems: Bridge the gap between big data and real-time product impact. You’ll build the infrastructure for serving ML models , using BigQuery and Apache Spark for offline data processing. You’ll integrate these components with our microservices architecture to create the sophisticated advertising system that powers a personalized user experience. Join the Advertising team! You will have a chance to build Allegro Ads - one of the most visible products on the platform. Your team works closely with the Machine Learning team, creating the best experience for customers. High performance, engineering best practices and great atmosphere in the team guaranteed! We are looking for people who: Code in Kotlin or Java and are eager to master Kotlin by taking part greenfield project 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; Are excited about building new products and want to experience the journey of launching a fresh project within the Allegro ecosystem; Are open to developing soft skills and embracing a growth mindset through active participation in code reviews, pair programming, and team retrospectives.; Are open to incorporating AI coding assistants into their daily work to maximize efficiency and focus on complex problem-solving 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. 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: The offer is for a proactive developer who will help scale an AI-driven software development model across the organization, combining hands-on coding with transformation initiatives. The role involves building AI-based internal tools and supporting teams in adopting AI across the full SDLC. You will work on real production projects while driving measurable improvements in efficiency and quality. 🗂️ Requirements: Active developer, Strong expertise in Java or .NET or frontend, Practical use of AI tools in daily development work, Understanding of full SDLC lifecycle, Ability to demonstrate measurable impact of delivered solutions, Willingness to work in hybrid model 📃 Skills: Java, .NET, Frontend, Cloud, AI, SDLC, Claude, Copilot, Playwright, Automation 🏢 Description: Salary: 1000-1300 PLN net / MD Hybrid work: we expect a positive attitude toward working in a hybrid model . We can hire in any of our locations (Gdynia/Gdańsk, Warsaw, Rzeszów, Kraków) . Why choose this offer? A strong impact on how the entire organization works Work on real projects (not just POCs) More about this offer We are looking for a proactive developer who will help us transform the way we build software . We are creating an environment where most of the SDLC (analysis, UX, code, testing, documentation) is supported by AI (Claude Code, agents, automations). We already have teams working in this model — now we want to scale this approach across the entire organization. Requirements Active developer Strong expertise in one of the following ecosystems: Java / .NET / frontend - we expect any level of experience with these technologies Active use of AI in daily work (not just ChatGPT for “assistance”) Understanding of the SDLC end-to-end (analysis → production) Enjoyment of working with people and driving changes in how they operate Ability to demonstrate concrete impact: “I did X → result Y” Nice to have skills Experience with AI agents (e.g. Claude Code, Cursor, Copilot, etc.) Test automation experience (e.g. Playwright) Experience in measuring team productivity Experience in building internal tools / platforms Duties Work as a developer (Java / .NET / frontend / cloud) Build internal AI-based solutions (agents, workflows, automations) Join teams and help them change the way they work: demonstrate how to use AI in daily tasks, support the implementation of specific practices (code, testing, analysis, UX) Measure effectiveness (time, quality, throughput) Report the level of AI adoption in teams (usage, impact, maturity) Create and maintain standards for working with AI (prompting, agents, memory, workflows) Share knowledge and help build an internal community About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy. Apply

🏢 Summary: Backend engineering role focused on building and operating high‑availability, large‑scale advertising systems in a cloud‑native environment. The position involves designing microservices, integrating ML infrastructure, and processing real‑time and offline data using modern technologies. You will own services end‑to‑end in a distributed, high‑performance ecosystem. 🗂️ Requirements: Proficiency in Kotlin or Java, Experience building microservices, Experience with distributed systems, Experience with high‑performance and high‑availability systems, Experience with data streaming systems, Experience with cloud‑native architectures, Experience integrating ML models into backend systems, Experience with BigQuery and Apache Spark, Ability to work with Kubernetes-based environments, English level B2 or higher 📃 Skills: Kotlin, Java, Spring, Kafka, Kubernetes, Docker, Consul, GitHub, GitHubActions, BigQuery, Spark, Microservices, ML, Hermes 🏢 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 11 200 - 15 250 Annual bonus based on your annual performance and company results. Our team is based in Poznań. 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. Our core technologies include Kotlin, Spring, Kafka, and Kubernetes. 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. 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. End-to-End ML Systems: Bridge the gap between big data and real-time product impact. You’ll build the infrastructure for serving ML models , using BigQuery and Apache Spark for offline data processing. You’ll integrate these components with our microservices architecture to create the sophisticated advertising system that powers a personalized user experience. Join the Advertising team! You will have a chance to build Allegro Ads - one of the most visible products on the platform. Your team works closely with the Machine Learning team, creating the best experience for customers. High performance, engineering best practices and great atmosphere in the team guaranteed! We are looking for people who: Code in Kotlin or Java and are eager to master Kotlin by taking part greenfield project 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; Are excited about building new products and want to experience the journey of launching a fresh project within the Allegro ecosystem; Are open to developing soft skills and embracing a growth mindset through active participation in code reviews, pair programming, and team retrospectives.; Are open to incorporating AI coding assistants into their daily work to maximize efficiency and focus on complex problem-solving 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. 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 engineering role in the Advertising team focused on building and operating high-performance, cloud-native microservices and ML infrastructure at massive scale. The position involves designing distributed systems, data streaming solutions, and end-to-end ML serving pipelines in a real-time marketplace environment. Engineers own services end-to-end, from design to deployment, within a modern Kotlin-based tech stack. 🗂️ Requirements: Proficiency in Kotlin or Java, Experience building high-performance, high-availability backend systems, Experience with distributed systems and microservices architecture, Experience with data streaming systems, Experience with cloud-native environments, Ability to design and deploy ML serving infrastructure, English at B2 level or higher 📃 Skills: Kotlin, Java, Spring, Kafka, Kubernetes, BigQuery, Spark, Docker, Consul, GitHub, GitHubActions, ML 🏢 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 11 200 - 15 250 Annual bonus based on your annual performance and company results. Our team is based in Warsaw. 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. Our core technologies include Kotlin, Spring, Kafka, and Kubernetes. 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. 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. End-to-End ML Systems: Bridge the gap between big data and real-time product impact. You’ll build the infrastructure for serving ML models , using BigQuery and Apache Spark for offline data processing. You’ll integrate these components with our microservices architecture to create the sophisticated advertising system that powers a personalized user experience. Join the Advertising team! You will have a chance to build Allegro Ads - one of the most visible products on the platform. Your team works closely with the Machine Learning team, creating the best experience for customers. High performance, engineering best practices and great atmosphere in the team guaranteed! We are looking for people who: Code in Kotlin or Java and are eager to master Kotlin by taking part greenfield project 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; Are excited about building new products and want to experience the journey of launching a fresh project within the Allegro ecosystem; Are open to developing soft skills and embracing a growth mindset through active participation in code reviews, pair programming, and team retrospectives.; Are open to incorporating AI coding assistants into their daily work to maximize efficiency and focus on complex problem-solving 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. 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: Remote position for an experienced full‑stack developer responsible for building new APIs, maintaining and upgrading backend and frontend applications, and improving product quality. The role involves bug fixing and continuous enhancement of existing systems using modern Java and JavaScript technologies. Salary depends on experience (3+ years). 🗂️ Requirements: Minimum 3 years of experience with Java, Minimum 3 years of experience with AWS, Minimum 3 years of experience with MongoDB, Minimum 3 years of experience with PostgreSQL, Minimum 3 years of experience with React.js, Minimum 3 years of experience with Spring Boot 📃 Skills: Java, AWS, MongoDB, PostgreSQL, React, SpringBoot, APIs 🏢 Description: Location: 100% remote Salary: 105–175 PLN net/h ( depending on experience, we are looking for candidates with 3 to +8 years of experience ) Tasks Development of new APIs to support clients Fixing bugs Upgrading and maintaining backend and frontend applications Looking for opportunities to improve the product Requirements Java – minimum 3 years of experience AWS – minimum 3 years of experience MongoDB – minimum 3 years of experience PostgreSQL – minimum 3 years of experience React.js – minimum 3 years of experience Spring Boot – minimum 3 years of experience Offer Multisport card Private healthcare Access to an e‑learning platform Group life insurance