Engineering Team Leader (Python)

🏢 Summary: Engineering Team Leader (Python) role focused on leading the Backoffice Engineering Team responsible for internal systems supporting logistics, warehouse management, accounting, customer support, and business intelligence. The position involves driving ERP implementation, improving system reliability, and embedding AI-driven automation into operational workflows. The role combines technical leadership, backend architecture ownership, and team development in a hybrid Warsaw-based setup. 🗂️ Requirements: Experience leading backend engineering teams, Expert-level Python, Expert-level Django, Strong system design skills, API architecture experience, Experience with observability and monitoring, Experience with alerting and incident response, Understanding of ERP platforms, Knowledge of backend system integrations, Knowledge of security and compliance practices, CI/CD fundamentals, Docker proficiency, Linux proficiency, GCP proficiency, Fluent Polish, Good English skills, Availability to work from Warsaw office 3 days a week 📃 Skills: Python, Django, ERP, API, CI/CD, Docker, Linux, GCP, AI 🏢 Description: Join Tylko, Where Design Meets Technology Founded in Warsaw, Poland, in 2015, Tylko is redefining how we design, shop for, and experience furniture. Frustrated by mass-produced, one-size-fits-all solutions, the team created something smarter: bespoke storage that balances cutting-edge technology, premium craftsmanship, and sustainable production. With millimetre-perfect precision, every piece is made-to-order and crafted locally , minimising waste and maximising longevity. The result? A new standard in furniture – one that fits your space, your style, and your life. Why It Matters We’re not just building furniture. We’re changing how people think about living with it. By merging technology and design, we help people create spaces that truly reflect who they are. If you believe that good design can make everyday life better, you’ll feel right at home here. How We Work We believe in small teams, big ideas, and simple processes. No endless paperwork, no silos. Just open communication, shared goals, and a healthy dose of curiosity. We start small, think big, and move fast, because progress always beats perfection . At Tylko, collaboration and trust aren’t buzzwords — they’re how we work. From day one, you’re part of a team that makes real decisions and brings them to life together. You’ll have the freedom to share ideas, turn them into action, and shape the space around you literally. Here, learning isn’t a bonus. It’s part of the job. About the Role We're looking for a strong Engineering Team Leader (Python) to join our Backoffice Engineering Team responsible for the internal systems that keep Tylko's operations running. The Backoffice Engineering Team builds and maintains the internal systems that power Tylko's core operations — logistics, warehouse management, accounting, customer support, and business intelligence. The team's mission is to automate operational workflows so the business can scale without proportional headcount growth. Over the next two years, the team will drive the implementation of an ERP system (starting with the accounting domain) and embed AI-driven automation across internal processes. The team is composed of Python developers and works in close partnership with the business functions that depend on what they build. What You’ll Do You'll take ownership, make things happen, and see your impact. Specifically, you will: Own the technical quality and architecture of the systems the team builds, setting the bar, making the hard calls, and ensuring decisions are well documented and consistently applied Lead and develop the team through regular 1-on-1s, clear growth paths, and a culture of genuine ownership that doesn't bottleneck on you Drive ERP implementation by integrating modules seamlessly into existing backend systems and ensuring the solution is stable, secure, and easy to evolve Act as the technical voice in cross-functional planning, surfacing constraints, risks, and trade-offs to business stakeholders before commitments are made Own system reliability and observability, including monitoring, alerting, the on-call process, and postmortems that lead to meaningful improvements Embed AI and automation into the team's work by identifying opportunities across significant initiatives and delivering measurable efficiency gains Why Tylko? Being a part of the Tylko team goes beyond clocking in every day. We celebrate inclusivity and work together to build a culture of happy, healthy employees who are truly heard. We provide: One bonus day off every month (in addition to regular days off) Comprehensive healthcare Multisport card A generous discount on all Tylko products A dog-friendly office! What we’re looking for: Proven experience leading a backend engineering team — setting technical direction, growing engineers, and being accountable for delivery, not just contributing as an IC Expert-level Python & Django — able to review, guide, and set standards across the team's codebase Strong system design and API architecture skills — experience making architecture decisions stick across a team Experience with observability, monitoring, alerting, and incident response for backend systems Understanding of ERP platforms and how they integrate with backend systems Awareness of security and compliance practices for systems handling financial or operational data CI/CD and DevOps fundamentals — comfortable with Docker, Linux, GCP; able to work effectively with the Platform team Fluent Polish and good command of English Fluent Polish and good command of English Working in our Warsaw office 3 days a week Ready to Design the Future with Us? If you’re looking for a place where your ideas matter, your curiosity is fuel, and your work has real impact — let’s talk. Join Tylko and help us make furniture smarter, homes happier, and everyday life a little more beautiful.

🏢 Summary: Executive-level engineering role leading the technical strategy, architecture, and operating model during a major e-commerce replatforming and ERP migration. Owns system-level design across configurator, rendering, data, AI-native workflows, and cloud infrastructure to scale a D2C platform integrated with on-demand manufacturing. Drives AI-first engineering practices, modular architecture, security foundations, and alignment between technology and business outcomes. 🗂️ Requirements: Multiple years leading engineering in high-growth e-commerce or B2C environments, Proven experience scaling distributed systems and engineering teams, Strong backend, cloud, and data architecture expertise, Track record leading replatforming or large-scale technical transformations, Experience embedding AI-assisted development workflows, Ability to define technical strategy across full-stack systems, Experience with engineering metrics, reliability, and developer productivity, Proven success hiring and structuring senior engineering teams, Fluency in Polish (C1), Fluency in English (C1) 📃 Skills: Python, Django, FastAPI, GCP, GKE, Nuxt, TypeScript, WebGL, Unreal, BigQuery, dbt, ERP, AI, Claude, Linear, SSR, Cloud, Kubernetes, SQL, Architecture 🏢 Description: About Tylko Tylko is a Warsaw-based D2C furniture company operating across 28 markets , combining a proprietary 3D configurator with on-demand manufacturing. We're ~200 people and a dynamically growing business heading into the next phase of scale. Tylko sits at an unusual intersection: the customer experience of a fast D2C brand, the product complexity of an innovative configurator with effectively infinite variants, and the operational reality of an on-demand manufacturing network. We're profitable and growing , and our peak days put more sessions through the configurator than most furniture brands see in a quarter. A Defining Moment for Engineering Our technology team of ~40 engineers is in the middle of a major transformation: replatforming our e-commerce stack, migrating core business systems including ERP, and embedding AI deeply across the entire engineering workflow. Reporting directly to the CPTO, the VP Engineering joins at the most consequential moment in Tylko's technical history - owning the architecture decisions that will define how we scale for the next decade. In this role, you will operate at the system level — designing how engineering works, not just what it builds . You will drive the development of Tylko's proprietary IP: the configurator engine, the real-time rendering pipeline, and the fully automated, just-in-time production network that turns a customer's design into a manufactured product at scale. You will empower our "Product Engineers" to deliver world-class solutions where deep technical architecture meets business-driven innovation. Building an AI-Native Engineering Organisation AI is reshaping how we design, review, and ship software at Tylko, and we're leaning into it hard. The company runs on Claude, agents are first-class assignees in Linear, and our engineers work AI-native by default — past the experimentation phase, into daily practice. What we need now is the next gear: turning what works in pockets into standards, alignment, and acceleration across the entire tech org . Because tech sits at the heart of how the whole company adopts AI, this role also helps drive that broader journey beyond engineering. Where we are today. We're at an inflection point. The systems we built over the last decade are working and we're in the middle of replacing the foundations underneath them: a composable replatforming, an ERP migration, and a real acceleration in how we build. We've also rolled out a new operating model across product and tech - the frame is in place, and we're now in the phase of making it real in day-to-day execution. The engineering team is strong and ambitious - and at a stage where the next phase needs more structure than they have today: clearer leadership paths and stronger seniority architecture. The company is hungry for the next phase, and serious about innovation. The VP Engineering joins to help take all of that further - faster, sharper, and more aligned across the org. Our stack reflects the breadth of what we build: Python and Django on the backend with FastAPI where we need it, running on GCP and actively migrating to GKE . The frontend is built on Nuxt with server-side rendering. Our geometry engine powering the configurator is a proprietary TypeScript library; the display layer runs on WebGL , with Unreal Engine called on demand for high-fidelity rendering. Our data platform is built on BigQuery and dbt . On tooling: we use all major frontier models without vendor lock-in, and Linear is our work management system - including as the surface for agentic workflows. What you'll do This role owns the tech operating model, the decision-making structures, and the alignment mechanisms that let engineers move fast without losing coherence across Tylko's domains. Specifically, you will: Define and own technical strategy across all of Tylko's domains - spanning customer experience, physical product, fulfilment, and enabling platforms - ensuring architecture decisions hold up through the next phase of growth . Partner with the CPTO on product-tech direction and on how engineering connects into the wider company. The operating model that links tech to the rest of the business is set; you own how engineering actually runs inside that frame - the team setup, the engineering practices, the day-to-day way software gets built. Together we co-lead the product and software-development culture. Evolve the engineering organization for its next chapter - strengthening the craft culture, clarifying seniority and tech leadership paths that today aren't where they need to be, and building out a strong layer of engineering heads. This isn't about adding headcount; it's about creating the structure and standards that let a talented team operate at a higher level . Champion innovation across two frontiers that define Tylko: how AI reshapes the experience of designing and buying furniture, and how technology drives the company's deeper bet on automated, on-demand manufacturing - turning digital configuration and physical production into a single integrated system, and pushing it further toward Industry 4.0. Steer the replatforming and ERP migration programs at the architecture and strategy level, ensuring decisions made today hold up as Tylko scales. Own the data platform as a strategic asset - shaping how data architecture, analytics, and data engineering support pricing, production, supply chain, and customer experience decisions. Treat data as a product: reliable, well-modelled, and trusted at every level of the business, from a designer iterating on a configurator detail to the board reviewing weekly performance. Build the security and compliance foundatio n Tylko needs for its next phase - we're at the point where this stops being something you handle ad-hoc and starts being something you architect. Establish the practices, ownership, and tooling that protect customer data, manufacturing systems, and the codebase as the surface area grows. Oversee the transitio n towards a modular architecture while balancing innovation with technical debt, system complexity, and maintainability of AI-assisted codebases. Make sure local engineering decisions compose into architecture that scales - team autonomy and system coherence have to reinforce each other, not trade off. Sit at the cross-functional leadership table as a peer - shaping company-level decisions where customer experience, manufacturing, and platform choices intersect. Not a tech lead being briefed on strategy, but someone helping set it. Define the engineering health metrics, OKRs, and operating cadence that connect technical excellence to business outcomes - and hold the team accountable to them. Why Tylko? Being a part of the Tylko team goes beyond clocking in every day. We celebrate inclusivity and work together to build a culture of happy, healthy employees who are truly heard. We provide: One bonus day off every month (in addition to regular days off) Comprehensive healthcare Multisport card A generous discount on all Tylko products A dog-friendly office! What we're looking for: Multiple years leading engineering at high-growth e-commerce or B2C scale-up environments, with hands-on experience scaling systems and teams through rapid business growth Strong technical foundation across backend systems, cloud infrastructure, and data platforms - with the credibility to lead and make decisions across the full engineering stack Ability to make smart decisions quickly and move on - comfortable with incomplete information, low attachment to being right, high attachment to moving forward Actively curious engineer who stays close to emerging tools and AI-assisted development workflows - leading with credibility, not just authority Proven ability to attract and hire senior engineering talent - both as a direct skill (you've personally closed strong candidates) and as a system-builder (you've shaped how teams hire, calibrate, and onboard). The Warsaw senior engineering market is competitive; this role wins or loses on the strength of the people you bring in. Proven track record in leading major technical transformations or replatforming projects Fluent in the loop between technical decisions and business outcomes - comfortable reasoning about how rendering performance moves conversion, how configurator latency shapes AOV, or how production SLOs affect retention. The architecture choices in this role aren't abstract; they show up in the P&L. Fluency in engineering effectiveness metrics - from system reliability and delivery flow to developer productivity and platform health Experience with AI-first development workflows - coding agents, code review, testing, documentation - and how to embed them into an engineering team's daily practice A strong plus (not a requirement): experience from companies where digital and physical operations are deeply integrated - manufacturing, logistics, hardware, fulfilment-heavy commerce. Fluency in Polish (C1) and English (C1) Working from our Warsaw office 3 days per week

🏢 Summary: The role involves designing and developing frontend and backend services using a modern Microsoft Azure cloud stack, following clean architecture principles and ensuring high code quality. You will build and maintain REST-based APIs, infrastructure components, and CI/CD pipelines while working in an Agile, cross-functional team. The position requires strong experience in Angular, Node.js, and C#/.NET within cloud-based environments. 🗂️ Requirements: Fluent spoken and written English, 4+ years of experience with Angular, 4+ years of experience with Node.js, 4+ years of experience with C#/.NET (.NET Core preferred), Experience with Microsoft Azure services, Experience with Azure SQL, Azure Key Vault, Azure API Management, Azure Logic App, Azure EventGrid, Azure Data Factory, Experience with Docker and Kubernetes, Experience with Infrastructure as Code using Terraform, Experience designing REST-based APIs, Experience with CI/CD pipelines, Experience with database design and data access, Experience working in Agile teams 📃 Skills: Angular, Node.js, C#, .NET, Azure, AzureSQL, AzureKeyVault, AzureAPIManagement, AzureLogicApp, AzureEventGrid, AzureDataFactory, Docker, Kubernetes, Terraform, REST, CI/CD, SQL 🏢 Description: About Us ERGO Technology & Services S.A. (ET&S), a member of the Munich Re and ERGO Group, is delivering integrated IT and business services to international markets. Our expertise lies in providing advanced IT services, with a focus on modern, business-driven technology solutions. On the business side, we also support the Group in various end-to-end insurance processes, including finance, operations, and underwriting. With offices in Warsaw and Gdansk, and strong global partnerships, we foster a dynamic, multicultural environment that promotes diversity and international opportunities. How you will get the job done designing and developing frontend and backend services using a state of the art Microsoft Azure cloud based tech stack following clean architecture principles and implementing appropriate patterns taking care of code quality, participating in peer programming and code reviews covering different areas of backend technology, both infrastructure and code components (rest-based API controllers, house-keeping services, CI/CD pipelines, data access, and database design) working in Agile team, taking part in the corresponding meetings (daily, refinement, planning & review, retrospective) presenting features developed to stakeholders Skills and experience you will need fluent spoken and written English 4+ years of proven experience in developing frontend services using Angular 4+ years of proven experience in developing backend services using Node.js 4+ years of proven experience in developing backend services with C#/.NET (.NET Core preferred) experience with Azure Services including Azure SQL, Azure Key Vaults, Azure API Management, Azure Logic App, Azure EventGrid, Azure Date Factory experience with Docker Containers/Kubernetes Clusters experience with Infrastructure as Code (Terraform) ability to grow on challenges in a demanding environment strong communication skills, high degree of customer orientation being an active member of an agile, cross-functional team developing cool software Nice to have background in Python knowledge of German Perks & Benefits Let's be healthy Medical package, sports card, and numerous sports sections – these are some of the benefits that help our employees stay in good shape. Let's be balanced Work-life balance is a key aspect of a healthy workplace. We offer our employees flexible working hours, a confidential employee assistant program, as well as the possibility of remote working. However, staying at home with our in-office gaming room and dog-friendly office in Warsaw won’t be easy. Let's be smart We organize numerous workshops and training courses. Thanks to hackathons and meetups, our specialists share their expertise with others. Additionally, we have a wide range of digital learning platforms and language courses. Let's be responsible Each year, we participate in several CSR activities, during which, together with our colleagues, we do our best to create a better future. Let's be fun Company-wide bike races and soccer matches, film marathons in our cinema room or other engaging team-building activities – we got it covered! Let's be diverse Every team member is valued, regardless of gender, nationality, religious beliefs, disability, age, and sexual orientation or identity. Your qualifications, experience, and mindset are our greatest benefit!

🏢 Summary: Senior Backend Engineer role focused on designing, building, and maintaining production backend systems and AI-driven workflows in a fully onsite Warsaw office environment. The position involves ownership of system architecture, APIs, distributed systems, and cloud infrastructure from design through production. Candidates will collaborate across teams, improve engineering processes with AI tools, and contribute to scalable, reliable solutions. 🗂️ Requirements: Strong experience as a senior backend engineer on production systems, Excellent Python programming skills, Understanding of distributed systems, Experience with AWS or Azure cloud platforms, Knowledge of SQL and NoSQL databases, Experience with asynchronous processing and service design, Ability to design and deliver systems from idea to production, Strong written and spoken communication skills, Regular use of AI development tools, Ability to work fully onsite in Warsaw 📃 Skills: Python, AWS, Azure, SQL, NoSQL, APIs, AI, TypeScript, GitHub, Copilot, Claude, OpenAI, Codex 🏢 Description: Please note: This role requires working from our office in Warsaw city centre 5 days a week . This is a fully on-site position , and remote or hybrid work is not available . About Us Many companies want to use AI agents, but these agents often struggle with real business tasks. We solve this problem by building a platform that helps AI understand business rules, workflows, and processes. This allows AI to make better decisions and provide accurate, reliable, and compliant results. Well-known companies from different industries use our technology to automate up to 85% of customer cases, reduce handling time by 20–25%, and complete tasks that used to take hours in just seconds. We also work with leading technology partners and have been recognized for our innovative approach. Our goal is to help people everywhere get better answers through AI. Job Description We are looking for a Senior Backend Engineer who can take ownership of important systems instead of only completing assigned tasks. You will solve complex problems, design backend solutions, build them, and make sure they run well in production. We want someone with strong technical skills, good communication, and the ability to create simple, reliable, and easy-to-maintain systems. This is a product engineering role with responsibility from system design to production. The position is based in Warsaw and requires office work. Responsibilities Design and develop backend services, APIs, data processing, and background tasks for production systems. Turn unclear business needs into clear technical plans and practical solutions. Maintain services after release by improving reliability, monitoring, performance, and fixing issues. Make good decisions about system architecture, data models, interfaces, and future scaling. Write technical documentation, architecture notes, and diagrams when they help the team. Work closely with product managers, frontend engineers, and platform engineers to deliver complete solutions. Improve development processes using AI tools, automation, and internal workflows. Support the team through code reviews, design reviews, and practical technical leadership. Requirements Strong experience as a senior backend engineer working on production systems. Excellent Python skills and the ability to write clean and maintainable code. Good understanding of distributed systems, including concurrency, failure handling, data consistency, asynchronous processing, and service design. Experience with cloud platforms such as AWS, Azure, or similar services. Knowledge of SQL, NoSQL databases, schema design, and performance optimization. Ability to take a project from an idea through design and implementation to production. Strong written and spoken communication skills with the ability to explain technical topics clearly. Regular use of AI tools in everyday development and interest in improving AI-based workflows. Nice to Have Experience with LLM-based applications, search systems, AI infrastructure, or large data pipelines. Knowledge of TypeScript or the ability to contribute to frontend development when needed. Experience guiding other engineers and influencing technical decisions without being a formal manager. What We Offer B2B contract and company stock options. MacBook Pro for work. Modern technology stack and opportunities to contribute to open-source projects. Access to advanced AI development tools, including GitHub Copilot, Claude Code, OpenAI Codex, TypingMind, and MCP servers. Our Culture and Values Our leadership team has strong experience in AI and knowledge management. We have secured more than $60 million in funding and achieved three years of continuous 3x growth. Our work is based on these values: Quality – We aim for excellent work and high coding standards. Momentum – We take initiative and keep projects moving forward. Accountability – We take responsibility and give honest, respectful feedback. Hard Work – We believe great results come from teamwork and consistent effort. Learning Agility – We stay curious, learn from mistakes, and improve every day. Adapt and Thrive – We accept change and see challenges as opportunities. Win Together – We succeed as one team through honesty, openness, and support for our shared mission.

🏢 Summary: Backend engineering role focused on designing and operating high-availability microservices at massive scale within a cloud-native environment. The position involves building AI-driven pipelines and distributed systems that ensure product catalog quality in a real-time marketplace. You will own services end-to-end, working with Kotlin/Java, streaming technologies, and Kubernetes in an autonomous, agile team. 🗂️ Requirements: Proficiency in Kotlin or Java, Experience with distributed systems and microservices architecture, Experience with data streaming systems, Ability to design high-availability and high-performance systems, Experience with cloud-native environments, English B2 level minimum, Polish B2 level minimum 📃 Skills: Kotlin, Java, Spring, Kafka, Kubernetes, Docker, Consul, GitHub, GitHubActions, Microservices, LLM, MachineLearning 🏢 Description: 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. Our team owns the quality of product content in Allegro's product catalog — names, descriptions, and the processes that keep them correct at scale. We build AI-driven pipelines (including LLM-based evaluation and generation) that automatically maintain content quality, and we run A/B experiments to prove when catalog data is ready to replace merchant-provided content on the buyer path. We work in a cross-functional setup with backend engineers, a product manager, and close collaboration with data analysts and quality specialists. 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 Toruń. We are looking for people who: Code in Kotlin or Java ; 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; Can look for effective solutions to the requirements set by users; Want to constantly develop and update their knowledge; Are proactive and positive — you'll join people who actually like collaborating; Know English and Polish 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 Engineer role focused on building and operating high-availability, high-performance microservices in a large-scale, real-time marketplace. The position involves designing distributed systems, data streaming solutions, and AI-driven content quality pipelines using a modern cloud-native stack. You will own services end-to-end in an autonomous team following a "you build it, you run it" approach. 🗂️ Requirements: Proficiency in Kotlin or Java, Experience building high-availability, high-performance backend systems, Experience with distributed systems and microservices architecture, Experience with data streaming systems, Experience working in cloud-native environments, Ability to design, deploy, and operate services in production, Experience with AI/ML-driven pipelines, English B2 level minimum, Polish B2 level minimum 📃 Skills: Kotlin, Java, Spring, Kafka, Kubernetes, Docker, Consul, GitHub, GitHubActions, Microservices, DistributedSystems, DataStreaming, MachineLearning, LLM, A/BTesting, ServiceMesh, Cloud, Hermes 🏢 Description: 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. Our team owns the quality of product content in Allegro's product catalog — names, descriptions, and the processes that keep them correct at scale. We build AI-driven pipelines (including LLM-based evaluation and generation) that automatically maintain content quality, and we run A/B experiments to prove when catalog data is ready to replace merchant-provided content on the buyer path. We work in a cross-functional setup with backend engineers, a product manager, and close collaboration with data analysts and quality specialists. 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 Toruń. We are looking for people who: Code in Kotlin or Java ; 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; Can look for effective solutions to the requirements set by users; Want to constantly develop and update their knowledge; Are proactive and positive — you'll join people who actually like collaborating; Know English and Polish 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 focused on building secure, scalable systems for fraud prevention, compliance, and data transparency in a large-scale marketplace environment. The position involves developing automation-driven backend platforms using Python, JVM technologies, cloud data tools, and modern infrastructure. The team offers high architectural autonomy, hybrid work, and opportunities to work with large-scale distributed systems and ML-supported solutions. 🗂️ Requirements: Python, Willingness to work with JVM languages, Experience with Kotlin, GCP, BigQuery, Dataproc, Clean code practices, Code reviews, Analytical mindset, Problem-solving skills, English B2 📃 Skills: Python, Kotlin, JVM, GCP, BigQuery, Dataproc, Spark, SQL, MachineLearning, MLOps, Kubernetes, Docker, Consul, GitHub, GitHubActions, MacBook, Windows 🏢 Description: About the job: Maintaining top-tier safety standards at macro scale: Allegro is a safe platform for millions of users. You will design, develop, and maintain backend systems that keep frauds and policy violations at an absolute minimum. Designing core data-sharing and transparency platforms: You will design, develop, and maintain high-security internal platforms responsible for trusted data exposure and compliance. Instead of dealing with legacy external tech, you will build modern abstraction layers that handle data flows, strict auditing, and access control. Data-driven engineering culture: We focus on automation, clean documentation, and code optimization. We actively eliminate repetitive manual work in favor of building stable, scalable system solutions. Mature and collaborative team: You will join a 6-person team with a strong senior presence. We heavily value engineering craftsmanship, knowledge sharing and high architectural autonomy. Technological Compliance & R&D: You will design solutions where advanced backend architecture meets evolving regulatory landscapes and market dynamics. Your work involves building intelligent tools that guarantee the transparency of our marketplace and quickly adapt to sophisticated, creative patterns, making our marketplace resilient to any emerging risks. Pragmatic Tech Stack : We select the best tools for the job rather than sticking to one framework. Our ecosystem includes JVM languages and Python. We process data using BigQuery and Spark jobs, utilize graph, relational and document databases, and implement traditional Machine Learning models to support decision-making. Driving Automation : You will play a key role in transforming how we handle verification processes. We are moving heavily towards automation to make our systems faster, more accurate, and less reliant on manual intervention. 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 18 850 - 25 900 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 Python and is willing to expand into JVM languages (Kotlin) to work with other parts of our system. Are comfortable with GCP tools , particularly BigQuery and Dataproc. Want to build solid, clean code , actively participate in code reviews, and enjoy sharing knowledge with the team. Have a strong sense of ownership and mission , wanting to directly impact the safety of millions of Allegro users. Possess an analytical mindset and a problem-solving attitude. Use AI tools to boost daily productivity but maintain critical thinking and never blindly accept code suggestions. Communicate in English at a B2 level or higher. Nice to have: Experience or strong interest in Machine Learning (ML) and MLOps 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: Senior or Staff Backend Engineer role focused on architecting and scaling AI-native backend services for a modern accounting platform. The position involves designing distributed systems, building secure and high-performance APIs, and establishing engineering standards to support rapid, reliable product delivery. You will work closely with Product, AI, and Operations teams to build scalable data pipelines and incident response infrastructure. 🗂️ Requirements: 5–10+ years of backend engineering experience, Proven experience designing and operating production backend systems at scale, Strong expertise in API design and data modelling, Deep understanding of distributed systems and architectural trade-offs, Hands-on experience with AWS or GCP in production environments, Practical experience with CI/CD pipelines and automated testing, Experience building and maintaining observability and on-call practices 📃 Skills: TypeScript, Node.js, React, AWS, GCP, Terraform, PostgreSQL, OpenAI, Azure, CI/CD, APIs, DistributedSystems, DataModelling, Observability 🏢 Description: ABOUT THE COMPANY We're an applied AI company building an AI-native alternative to legacy accounting software — a market worth tens of billions in annual recurring revenue. Our mission is to help entrepreneurs focus on what matters in their business and life, and to help their accountants become more strategic. We've raised $20M from a group of top-tier investors and have grown ARR 60% month-on-month since our public launch. We now serve thousands of businesses and are expanding our product to serve accountants directly — creating a two-sided platform where both business owners and their accountants use and recommend us. We're at an early but proven stage, moving fast, and building a world-class engineering team in Wrocław to match our ambition. ABOUT THE ROLE We're looking for a Senior or Staff Backend Engineer to own and evolve our backend services as we scale. This is a broad, high-impact role — you'll architect new features, build the systems that underpin our core product, and set the engineering standards that shape how the whole team works. The focus is on building a modern, AI-native developer experience. That means working closely with Product, AI, and Operations teams to design agentic systems, distributed data pipelines, and scalable incident response infrastructure — and doing it in a way that lets the team ship with confidence multiple times a day. WHAT YOU'LL WORK ON Architecture and feature design Partner with Product, AI, and Operations teams to architect new features and complex agentic systems. Make clear architectural trade-offs that balance platform, product, and business goals. Backend services and APIs Build and maintain the backend services and APIs that power the core product. Ensure systems are secure, well-tested, and high performance. Distributed systems Design and implement distributed services to orchestrate data pipelines, automate investigations, and enable incident response at scale. Operational excellence Own operational best practices so the team can ship multiple times a day with confidence. Healthy on-call culture and strong observability are part of what you'll build and maintain. Engineering standards Set the bar for writing, communication, and system design across the team. Your influence will shape how a modern AI-native product is built. WHAT WE LOOK FOR 5–10+ years of backend engineering experience A strong track record designing, building, and operating production backend systems at scale. Deep backend fundamentals Expertise in API design, data modelling, and reasoning about distributed systems trade-offs. You understand the nuances, not just the patterns. AWS or GCP hands-on experience Solid understanding of how infrastructure decisions impact application reliability and performance. You've run things in production, not just designed them. CI/CD in practice Practical experience with testing and deployment strategies in high-frequency shipping environments. Observability and on-call maturity A solid grasp of what good observability looks like and how to build healthy on-call practices that don't burn people out. Bonus Experience at an early-stage or scaling startup. Exposure to modern AI and ML systems. Experience shipping product without a dedicated product manager. TECH STACK TypeScript, React, Node.js, AWS, Terraform, PostgreSQL, OpenAI, Azure AI. The team uses GitHub, Slack, Linear, Figma, and Notion day to day. THE TEAM Small, senior, and in-person. The office is in central Wrocław, next to the main train station. The expectation is 4–5 days a week in the office — this is a deliberate choice, not a compromise. Relocation support is available for the right candidate. COMPENSATION & BENEFITS Salary $130,000 – $190,000 USD depending on experience, plus competitive equity. Wellness and commute stipend $100 per month. Hardware Premium hardware provided — MacBook Pro and AirPods. Food Daily in-office lunch and dinner. Time off 20 PTO days plus 9 US public holidays. Relocation Support available for candidates relocating to Wrocław.

🏢 Summary: Backend Developer role focused on designing and developing cloud-based services using Microsoft Azure and .NET technologies, following clean architecture and CQRS patterns. The position involves building REST APIs, managing infrastructure and CI/CD pipelines, and contributing to database design within an Agile team environment. 🗂️ Requirements: 3+ years experience in backend development with C#/.NET, Experience with .NET Core, Experience with Azure Services (Azure SQL, Azure Service Bus, Azure Cosmos, Azure Event Grid), Experience with CQRS pattern, Experience with MediatR, Experience with Infrastructure as Code, Experience with Terraform, Experience with Azure DevOps, Experience with YAML-based CI/CD pipelines, Experience in designing REST APIs, Experience in database design, Experience working in Agile teams 📃 Skills: C#, .NET, .NETCore, Azure, AzureSQL, ServiceBus, CosmosDB, EventGrid, CQRS, MediatR, Terraform, AzureDevOps, YAML, REST, SQL, CI/CD 🏢 Description: About Us ERGO Technology & Services S.A. (ET&S), a member of the Munich Re and ERGO Group, is delivering integrated IT and business services to international markets. Our expertise lies in providing advanced IT services, with a focus on modern, business-driven technology solutions. On the business side, we also support the Group in various end-to-end insurance processes, including finance, operations, and underwriting. With offices in Warsaw and Gdansk, and strong global partnerships, we foster a dynamic, multicultural environment that promotes diversity and international opportunities. How you will get the job done designing and developing backend services using a state of the art Microsoft Azure cloud based tech stack following clean architecture principles and implementing appropriate patterns (e.g. CQRS) taking care of code quality, participating in peer programming and code reviews covering different areas of backend technology both infrastructure and code components (rest based API controllers, house-keeping services, CI/CD pipelines, data access, and database design) working in Agile team, taking part in the corresponding meetings (daily, refinement, planning & review, retrospective) presenting features developed to stakeholders Skills and experience you will need 3+ years of proven experience in developing backend services with C#/.NET (.NET Core preferred) experience with Azure Services including Azure SQL, Azure Service Bus, Azure Cosmos, Azure Event Grid experience with applying design patterns (CQRS) and supporting libraries (MediatR) experience with Infrastructure as Code (Terraform) and Azure DevOps, YAML based CI/CD pipelines ability to grow on challenges in a demanding environment strong communication skills, high degree of customer orientation being an active member of an agile, cross-functional team developing cool software Nice to have background in Typescript, Angular, NodeJS, Docker knowledge of German Perks & Benefits Let's be healthy Medical package, sports card, and numerous sports sections – these are some of the benefits that help our employees stay in good shape. Let's be balanced Work-life balance is a key aspect of a healthy workplace. We offer our employees flexible working hours, a confidential employee assistant program, as well as the possibility of remote working. However, staying at home with our in-office gaming room and dog-friendly office in Warsaw won’t be easy. Let's be smart We organize numerous workshops and training courses. Thanks to hackathons and meetups, our specialists share their expertise with others. Additionally, we have a wide range of digital learning platforms and language courses. Let's be responsible Each year, we participate in several CSR activities, during which, together with our colleagues, we do our best to create a better future. Let's be fun Company-wide bike races and soccer matches, film marathons in our cinema room or other engaging team-building activities – we got it covered! Let's be diverse Every team member is valued, regardless of gender, nationality, religious beliefs, disability, age, and sexual orientation or identity. Your qualifications, experience, and mindset are our greatest benefit!

🏢 Summary: Backend Engineer role focused on building production systems for AI agents, including backend services, APIs, and data pipelines for enterprise customers. The position involves designing reliable distributed systems, maintaining production services, and collaborating closely with cross-functional teams in a fully on-site Warsaw office environment. The company offers a modern AI-focused tech stack, B2B contract, stock options, and opportunities to contribute to open-source projects. 🗂️ Requirements: 3–5 years of experience building backend production systems, Strong Python skills, Understanding of distributed systems, Experience with AWS, GCP, or Azure, Knowledge of SQL and NoSQL databases, Database design experience, Security-focused approach to system design, Ability to manage projects from idea to production, Strong written and spoken communication skills, Experience using AI tools in software development, Ability to work fully on-site in Warsaw 📃 Skills: Python, AWS, GCP, Azure, SQL, NoSQL, AI, TypeScript, APIs, GitHub, Copilot, Codex, Claude 🏢 Description: Please note: This role requires working from our office in Warsaw city centre 5 days a week . This is a fully on-site position , and remote or hybrid work is not available . About us We believe that businesses are moving toward AI-powered work, and we are building a platform for this future. Many AI agents cannot handle complex business tasks. We created a platform that organizes company policies, workflows, and business knowledge into one AI data model. This helps AI agents make accurate decisions and deliver reliable results at scale. We already work with well-known enterprise customers such as Glovo, Nespresso, and HelloFresh. Our platform supports thousands of users and handles real production data. Customers trust us with important business knowledge because we provide a secure and reliable solution with SOC2, HIPAA-ready security practices, and strong integrations. Job description We are looking for a backend engineer with several years of experience who wants to take responsibility for real systems, not only complete assigned tasks. You will solve backend challenges, choose the best technical solutions, deliver new features, and support them in production. We are looking for someone with good technical skills, clear communication, and a desire to build systems that are simple, reliable, and easy to improve. You will help build production systems for AI agents, working on real problems for customers who already use our platform. The position is based in Warsaw and requires working from the office. Responsibilities Build backend services, APIs, data pipelines, and background processes for production systems. Turn business requirements into technical solutions and implementation plans. Monitor and maintain services after release, improving reliability, performance, and system monitoring. Design service interfaces and data models that fit well into the overall system. Create technical documentation and diagrams when they help the team. Work closely with product managers, frontend engineers, and platform engineers. Improve engineering processes using AI tools, automation, and better workflows. Help maintain high code quality through code reviews and design reviews. Requirements Around 3–5 years of experience building backend production systems. Strong Python skills and the ability to write clean and maintainable code. Good understanding of distributed systems, including concurrency, failures, data consistency, asynchronous processing, and service communication. Experience with cloud platforms such as AWS, GCP, or Azure, and knowledge of SQL, NoSQL, and database design. A security-focused approach when working with sensitive data and system design. Ability to manage projects from idea to production with increasing responsibility. Good written and spoken communication skills, with the ability to explain technical decisions clearly. Experience using AI tools as part of your daily software development work. Nice to have Experience with AI agents, orchestration, retrieval systems, tool calling, or LLM-based infrastructure. Knowledge of TypeScript or willingness to work across the full technology stack. Experience taking on more responsibility and learning quickly. What we offer B2B contract and company stock options. MacBook Pro. Modern technology stack and the opportunity to contribute to open-source projects. An AI-focused development environment with tools such as Claude Code, OpenAI Codex, and GitHub Copilot. Our values Our leadership team combines strong experience in AI, knowledge management, and enterprise SaaS. We have received more than $60 million in funding and have been recognized by Gartner as a Cool Vendor. Our work is guided by these values: Quality – We care about excellent work and high standards in everything we build. Momentum – We take initiative, share ideas, and keep moving forward. Accountability – We take responsibility for our work and give honest, respectful feedback. Hard work – We believe success comes from teamwork, dedication, and consistent effort. Learning agility – We stay curious, learn from mistakes, and continue improving. Adapt and thrive – We welcome change and see challenges as opportunities to grow. Win together – We work as one team, communicate openly, and support our shared goals.