Senior Distributed Systems Engineer (Java)

🏢 Summary: Design and lead the implementation of highly scalable, high‑performance ad serving and tracking systems, building and optimizing HTTP/gRPC services and batch jobs in Java and Python. The role combines hands-on development with technical leadership, focusing on observability, reliability, and measurable performance improvements in distributed production environments. You will work on globally distributed systems handling large-scale traffic with strong engineering and code quality standards. 🗂️ Requirements: Experience designing and implementing high-performance, scalable distributed systems, Strong knowledge of Java and Python, Experience building and maintaining HTTP and gRPC services, Understanding of Internet protocols (DNS, HTTP, cookies), Knowledge of concurrency and distributed systems concepts, Ability to monitor, analyze and optimize production systems, Experience with high scalability and high availability architectures, Fluent English and Polish (C1) 📃 Skills: Java, Python, HTTP, gRPC, DNS, Aerospike, Memcached, GCP, BigQuery, MinIO, Kafka, Clickhouse, PostgreSQL, Elasticsearch, Kubernetes, Prometheus, Jenkins, Graphite 🏢 Description: You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement, test, deploy, monitor and maintain (in all aspects, including setting up environment, writing configuration code, monitor production) HTTP / gRPC services and batch jobs in Java and Python, ensuring adherence to the high engineering standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Desired experience: Excellent understanding of how complex IT systems work - from the hardware level, through software, to algorithms. Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to geo-distributed clusters level). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production). General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: Java, Python Aerospike, Memcached Google Cloud Platform, BigQuery, MinIO Kafka, Clickhouse PostgreSQL Elasticsearch Kubernetes, Prometheus Jenkins, Graphite We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering, send us your CV, and we'll review it.

🏢 Summary: Senior-level role focused on designing and leading high-performance, scalable frontend and full-stack solutions for global ad delivery and tracking systems. The position emphasizes web performance optimization, observability (RUM and Synthetic), and architectural excellence across performance-critical features. You will drive measurable improvements in user metrics while maintaining top coding standards and technical leadership. 🗂️ Requirements: 8+ years of hands-on software engineering experience, Strong understanding of frontend development and internal mechanisms, Proven experience in web performance optimization and advanced loading strategies, Proficiency in JavaScript and TypeScript, Experience with modern frontend frameworks (React), Experience with build tools (Webpack or Vite), Knowledge of Internet protocols and technologies (DNS, HTTP, cookies), Experience monitoring and analyzing production systems, Understanding of full-stack concepts and backend APIs (Node.js, Python, or Java), Experience with deployment and CI/CD pipelines 📃 Skills: JavaScript, TypeScript, React, Node.js, Python, Java, Webpack, Vite, DNS, HTTP, Cookies, RUM, Synthetic, CICD, Caching, Monitoring 🏢 Description: You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement and maintain high-quality frontend and full-stack solutions for displaying Ads globally, focusing on extreme performance and scalability. Develop monitoring systems (RUM and Synthetic) to track crucial metrics like reliability or viewability and use data to diagnose and resolve performance bottlenecks. Collaborate closely with Ads Layouts specialists and backend engineers to ensure smooth data flow and optimal architectural alignment for performance-critical features. Write, test, and deploy robust, efficient, and well-documented code in JavaScript/TypeScript/Python/Java, ensuring adherence to the highest coding and performance standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Requirements: 8+ years of hands-on experience in software engineering, including the understanding of Frontend Development and its internal mechanisms. Practical experience and strong understanding of Web Performance optimization techniques and advanced loading strategies (caching, asset delivery). Solid proficiency in JavaScript/TypeScript and modern frameworks like e.g., React. Experience with relevant build tooling (e.g., Webpack, Vite). Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). Good understanding of full-stack concepts, including working with backend APIs (Node.js, Python, or Java) and deployment/CI/CD pipelines. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: You will be working within a modern stack that includes JavaScript/TypeScript, React, Node.js, Python, and Java. We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering or web performance, send us your CV, and we'll review it.

🏢 Summary: Lead the design and implementation of high-performance, scalable frontend and full-stack solutions for globally distributed ad systems, with a strong focus on web performance and observability. The role involves optimizing critical user metrics, building monitoring systems, and ensuring robust architecture and code quality across performance-sensitive features. 🗂️ Requirements: 8+ years of hands-on software engineering experience, Strong expertise in frontend development and internal browser mechanisms, Proven experience in web performance optimization and advanced loading strategies, Proficiency in JavaScript and TypeScript, Experience with modern frontend frameworks such as React, Experience with build tools such as Webpack or Vite, Solid understanding of Internet protocols including DNS and HTTP, Ability to monitor, analyze, and diagnose production system performance, Understanding of full-stack concepts and backend API integration, Experience with CI/CD pipelines 📃 Skills: JavaScript, TypeScript, React, Node.js, Python, Java, Webpack, Vite, DNS, HTTP, RUM, CICD, Caching 🏢 Description: You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement and maintain high-quality frontend and full-stack solutions for displaying Ads globally, focusing on extreme performance and scalability. Develop monitoring systems (RUM and Synthetic) to track crucial metrics like reliability or viewability and use data to diagnose and resolve performance bottlenecks. Collaborate closely with Ads Layouts specialists and backend engineers to ensure smooth data flow and optimal architectural alignment for performance-critical features. Write, test, and deploy robust, efficient, and well-documented code in JavaScript/TypeScript/Python/Java, ensuring adherence to the highest coding and performance standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Requirements: 8+ years of hands-on experience in software engineering, including the understanding of Frontend Development and its internal mechanisms. Practical experience and strong understanding of Web Performance optimization techniques and advanced loading strategies (caching, asset delivery). Solid proficiency in JavaScript/TypeScript and modern frameworks like e.g., React. Experience with relevant build tooling (e.g., Webpack, Vite). Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). Good understanding of full-stack concepts, including working with backend APIs (Node.js, Python, or Java) and deployment/CI/CD pipelines. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: You will be working within a modern stack that includes JavaScript/TypeScript, React, Node.js, Python, and Java. We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering or web performance, send us your CV, and we'll review it.

🏢 Summary: Senior engineer role focused on designing and implementing high‑performance, scalable frontend and full‑stack solutions for global ad delivery systems. The position emphasizes web performance optimization, observability, and monitoring (RUM and Synthetic) to improve critical user metrics. You will lead technical initiatives, build performance‑critical features, and ensure high code quality across JavaScript/TypeScript-based systems. 🗂️ Requirements: 8+ years of hands-on software engineering experience, Strong understanding of frontend development and internal browser mechanisms, Practical experience with web performance optimization techniques, Proficiency in JavaScript and TypeScript, Experience with modern frontend frameworks (React), Experience with build tools (Webpack or Vite), Knowledge of Internet protocols (DNS, HTTP, cookies), Experience monitoring and analyzing production systems, Understanding of full-stack architecture and backend APIs (Node.js, Python, or Java), Experience with CI/CD pipelines 📃 Skills: JavaScript, TypeScript, React, Node.js, Python, Java, Webpack, Vite, DNS, HTTP, cookies, CI/CD, RUM, Synthetic, caching, observability, APIs 🏢 Description: You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement and maintain high-quality frontend and full-stack solutions for displaying Ads globally, focusing on extreme performance and scalability. Develop monitoring systems (RUM and Synthetic) to track crucial metrics like reliability or viewability and use data to diagnose and resolve performance bottlenecks. Collaborate closely with Ads Layouts specialists and backend engineers to ensure smooth data flow and optimal architectural alignment for performance-critical features. Write, test, and deploy robust, efficient, and well-documented code in JavaScript/TypeScript/Python/Java, ensuring adherence to the highest coding and performance standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Requirements: 8+ years of hands-on experience in software engineering, including the understanding of Frontend Development and its internal mechanisms. Practical experience and strong understanding of Web Performance optimization techniques and advanced loading strategies (caching, asset delivery). Solid proficiency in JavaScript/TypeScript and modern frameworks like e.g., React. Experience with relevant build tooling (e.g., Webpack, Vite). Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). Good understanding of full-stack concepts, including working with backend APIs (Node.js, Python, or Java) and deployment/CI/CD pipelines. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: You will be working within a modern stack that includes JavaScript/TypeScript, React, Node.js, Python, and Java. We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering or web performance, send us your CV, and we'll review it.

🏢 Summary: The offer is for a software engineer role focused on designing and optimizing high-performance, low-latency systems handling over 24 million queries per second. The position involves building scalable and reliable distributed components, improving performance, and developing monitoring and testing tools in a production environment. The role emphasizes high availability, scalability, and working with modern cloud and data technologies. 🗂️ Requirements: Proficiency in programming, Strong understanding of complex IT systems from hardware to algorithms, Knowledge of Internet protocols (DNS, HTTP, cookies), Knowledge of concurrent programming and distributed systems, Experience with monitoring and analyzing production systems, Ability to optimize system performance and resolve performance issues, Knowledge of high scalability and high availability concepts, C1 level English, C1 level Polish 📃 Skills: Java, Python, Aerospike, Memcached, GCP, BigQuery, MinIO, Kafka, Clickhouse, PostgreSQL, Elasticsearch, Kubernetes, Prometheus, Jenkins, Graphite, DNS, HTTP 🏢 Description: You Will: Design and programming of a wide range of modules and components as part of a system that supports over 24M queries per second and low latency. Work on the optimization of the developed software in terms of response time and resource consumption Ensure the reliability and scalability of the solutions built Create performance and correctness tests for new system components Analyse new technologies in terms of their applicability in production conditions Develop tools for monitoring and analysing the operation of the production system Continuous optimization of existing tools and processes Desired Experience: Proficiency in programming Excellent understanding of how complex IT systems work (from the hardware level, through software, to algorithmics) Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others) Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to continent level) Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it) The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production) General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability' C1 level in English and Polish Selected Technologies: Java, Python Aerospike, Memcached Google Cloud Platform, BigQuery, MinIO Kafka, Clickhouse PostgreSQL Elasticsearch Kubernetes, Prometheus Jenkins, Graphite We Offer: Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects. Cooperation based on B2B contract. You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow. Apply now! You don't need to tick every box to apply. If you are passionate about digital marketing, send us your CV, and we'll review it.

🏢 Summary: Engineering role focused on building and optimizing large-scale, real-time advertising systems with low latency and high availability. The position involves developing distributed applications, improving scalability and reliability, and collaborating across teams in a fast-paced environment. Experience with Java, distributed systems, cloud platforms, and big data technologies is required. 🗂️ Requirements: 5+ years building large-scale low-latency distributed systems, Strong proficiency in Java, Experience developing production-grade applications, Understanding of algorithms and data structures, Knowledge of object-oriented programming, Experience with multithreading, Knowledge of real-time systems, Performance optimization experience, Experience with distributed caching solutions, Experience with SQL databases, Experience with NoSQL databases, Experience with Big Data technologies, Experience with AWS or other cloud platforms, Strong problem-solving skills, Ability to collaborate with technical and non-technical stakeholders, Excellent communication skills 📃 Skills: Java, AWS, Kafka, SQL, NoSQL, BigData, Caching, Multithreading, OOP, Algorithms 🏢 Description: Join our Ad Engineering team and help build a highly scalable, highly available, real-time advertising platform powering millions of ad requests every day. You'll work on distributed systems that require low latency, high throughput, and exceptional reliability to support a fast-growing digital advertising business. If you enjoy solving complex engineering challenges, building systems at scale, and working with modern technologies, we'd love to hear from you. Responsibilities: Design, develop, and maintain large-scale, high-performance, real-time applications. Build and optimize distributed systems focused on scalability, reliability, and low latency. Collaborate with experienced engineers to deliver robust and maintainable software solutions. Work closely with technical and non-technical stakeholders to understand requirements and communicate solutions effectively. Ensure high code quality by following engineering best practices, testing, and continuous improvement. Deliver high-quality software on time in a fast-paced engineering environment. Requirements: 5+ years of experience building large-scale, low-latency distributed systems. Strong proficiency in Java and experience developing production-grade applications. Solid understanding of algorithms, data structures, object-oriented programming, multithreading, real-time systems, and performance optimization techniques. Hands-on experience with distributed caching solutions and SQL/NoSQL databases. Experience with Big Data technologies and cloud platforms, preferably AWS. Experience in the AdTech or digital advertising industry is a strong advantage. Strong problem-solving skills and the ability to work effectively in a collaborative environment. Excellent communication skills and the ability to work with both technical and non-technical stakeholders. 1+ years experience with Apache Kafka.

🏢 Summary: Backend engineering role focused on building scalable backend services, APIs, and internal developer platforms in a fully remote environment. The position involves improving system architecture, optimizing distributed systems, and collaborating across the full software development lifecycle. The offer includes influence on technical decisions, modern technologies, and growth opportunities within an experienced engineering team. 🗂️ Requirements: 5+ years of backend software development experience, Proficiency in PHP or experience with Java, Python, Go, Knowledge of RESTful APIs and GraphQL, Experience building scalable distributed backend systems, Experience with SQL/MySQL and database optimization, Experience with automated testing and monitoring, Knowledge of debugging production systems, Familiarity with contract-driven development, English for daily technical communication 📃 Skills: PHP, Java, Python, Go, REST, GraphQL, SQL, MySQL, React, API 🏢 Description: ✅ Your responsibilities: ・Design, develop, and maintain scalable backend services and APIs for third-party integrations. Improve platform architecture, service communication, and internal developer tooling. Collaborate with Product Managers, Designers, and Engineers throughout the entire software development lifecycle. Optimize existing systems for performance, scalability, reliability, and maintainability. Drive engineering best practices, including code quality, testing, and documentation. Participate in architecture discussions and technical decision-making. Mentor engineers through code reviews, pair programming, and knowledge sharing. Continuously improve the developer experience by building reliable internal platforms and tools. 🧠 Our requirements: 5+ years of experience in backend software development. Strong proficiency in PHP (preferred) or solid experience with Java, Python, Go , or similar backend technologies. Strong understanding of RESTful APIs , GraphQL , and API design best practices. Experience designing and building scalable, distributed backend systems. Hands-on experience with SQL/MySQL databases and database optimization. Experience with automated testing, observability, monitoring, and debugging production systems. Familiarity with contract-driven development and modern software development practices. Basic knowledge of frontend technologies such as React is a plus. Strong communication skills and the ability to collaborate across cross-functional teams. Passion for writing clean, maintainable, and high-quality code or AI automation English at a level allowing daily technical communication 🌟 What we offer: 100% remote work. Private healthcare and Multisport. Life insurance. Real influence on technical decisions and system architecture. Opportunity to build scalable backend services and developer platforms. Work with modern technologies in a collaborative engineering environment. Knowledge sharing, mentorship, and professional growth opportunities. Friendly, supportive, and experienced engineering team.

🏢 Summary: Frontend Developer role focused on building and enhancing responsive web applications using modern JavaScript frameworks and best programming practices. The position involves implementing business requirements, writing unit tests, performing code reviews, and maintaining technical documentation. Work is carried out in a Scrum team with CI/CD processes. 🗂️ Requirements: Minimum 2 years commercial experience in web application development, Higher education in Computer Science or related field, Very good knowledge of HTML5, CSS3, JavaScript (ES6/ES7), Experience with ReactJS and state management libraries, Experience with TypeScript, Ability to optimize and ensure application performance, Proficiency with Git and OOP principles, Experience with Jenkins, Jira, Confluence, Knowledge of CI/CD pipelines and TDD, Experience working in Scrum, Ability to work with technical documentation in English 📃 Skills: HTML5, CSS3, JavaScript, ES6, ES7, TypeScript, ReactJS, Redux, Saga, Bootstrap, jQuery, TSLint, JSLint, Webpack, Gulp, Grunt, Nodejs, NPM, SASS, LESS, OWASP, REST, W3C, Git, Jenkins, Jira, Confluence, CICD, TDD, Scrum, OOP 🏢 Description: Na co dzień w naszym zespole: tworzysz i rozwijasz aplikacje realizując wymagania biznesowe przy wykorzystaniu najlepszych praktyk programowania, projektujesz responsywne i nowoczesne aplikacje front-endowe, opracowujesz i obsługujesz testy jednostkowe oprogramowania, dzielisz się wiedzą i przeprowadzasz code review, przygotowujesz i aktualizujesz techniczną dokumentację poprojektową. Stack technologiczny: HTML5, CSS3, JavaScript (ES6/ES7) - bardzo dobra znajomość, TypeScript, Bootstrap, reactJS (Saga, Redux), jQuery, TSlint/JSLint, Webpack, Gulp/Grunt, Node.js, NPM, preprocesor SASS/LESS, top 10 podatności OWASP, webserwisy REST, W3C. To stanowisko może być Twoje, jeśli: masz min. 2-letnie doświadczenie komercyjne w tworzeniu aplikacji webowych, posiadasz wykształcenie wyższe (preferowane kierunki informatyczne lub pokrewne), potrafisz optymalizować i dbać o wydajność aplikacji, swobodnie korzystasz z system Git i projektujesz kod w oparciu o wzorce OOP, masz doświadczenie w pracy z Jenkins, Jira i Confluence, znasz narzędzia CI/CD oraz techniki TDD, posiadasz doświadczenie w pracy w zespole Scrum, posługujesz się j. angielskiego na poziomie umożliwiającym swobodną pracę z dokumentacją techniczną.

🏢 Summary: Hybrid B2B role for an Application Support Engineer focused on production support, DevOps practices, and CI/CD pipeline management in complex environments. The position involves leading incident resolution, optimizing service performance, managing containerized deployments, and driving automation and Infrastructure as Code initiatives. The role also supports AI/ML workloads and continuous improvement of operational processes. 🗂️ Requirements: Experience with Docker containerization, Experience with Kubernetes orchestration, Proficiency with CI/CD tools (Jenkins, Maven), Advanced troubleshooting using Splunk, Experience with relational databases (Oracle, DB2), Strong knowledge of DevOps practices, Experience managing production and pre-production environments, Ability to lead RCA and incident management processes 📃 Skills: Docker, Kubernetes, Jenkins, Maven, Splunk, Oracle, DB2, DevOps, CI/CD, RCA, IaC 🏢 Description: B2B contract rate 130 pln/h + VAT work mode: hybrid, Gdańsk We are seeking an experienced Application Support Engineer to join the team. The ideal candidate will have a deep understanding of DevOps practices, innovative solutions, and the ability to manage complex environments effectively. Main Responsibilities Lead RCA processes and implement preventive measures for incident & problem management. Monitor, analyze, and optimize service performance and stability in production support. Build, maintain, and enhance deployment pipelines for multiple APIs in CI/CD management. Maintain Pre-Production and Production environments through effective environment management. Collaborate closely with Platform Operations teams and the delivery factory to foster cross-team collaboration. Create comprehensive runbooks and knowledge bases for operational procedures. Evaluate and implement new DevOps tools, practices, and AI-powered solutions to drive innovation leadership. Implement Infrastructure as Code practices and drive automation for self-healing infrastructure solutions. Support AI/ML workload deployments and operations. Lead the adoption of emerging technologies and best practices. Key Requirements Experience with Docker containerization and Kubernetes orchestration. Proficient in CI/CD tools such as Jenkins and Maven. Advanced troubleshooting skills using tools like Splunk. Proficient in relational databases, specifically Oracle and DB2. Nice to Have Experience with Infrastructure as Code using Ansible. Basic knowledge of Spring, Hibernate, XML, JSON, and Kafka. Experience with modern observability tools such as Prometheus, Grafana, and ELK stack. Experience in AI/ML operations (MLOps) and AI agent deployments. Knowledge of AI model serving platforms and ML workload containerization. Strong understanding of AI agent orchestration and workflow automation. Ability to evaluate and integrate new DevOps tools and practices. Software development knowledge in Java/J2EE. Experience with cloud platforms (AWS, Azure, or GCP). Familiarity with IBM Datastage.

🏢 Summary: Offer for an experienced Python Backend Developer to build and scale AI-driven web microservices using FastAPI and PostgreSQL. The role focuses on developing AI solutions with frameworks like LangChain/LangGraph and integrating them into modern, scalable systems. You will work on high-quality code, RAG-based architectures, and AI-powered features in close collaboration with a backend and AI team. 🗂️ Requirements: Minimum 3 years of commercial experience with Python in web application development, Practical experience with FastAPI, Experience building AI solutions using LangChain or LangGraph, Basic knowledge of prompt engineering, Practical knowledge of PostgreSQL, Proficiency with Git and GitHub, Ability to use AI coding assistants (e.g., GitHub Copilot, Claude Code) 📃 Skills: Python, FastAPI, LangChain, LangGraph, PostgreSQL, Git, GitHub, PromptEngineering, GitHubCopilot, ClaudeCode, AI, RAG, Microservices 🏢 Description: Lubisz mieć realny wpływ na to, co tworzysz? My też! Szukamy osoby z doświadczeniem, która wnosi pomysły, potrafi dostrzegać problemy i proponować rozwiązania. Pracujemy w środowisku opartym na zaufaniu, jakości kodu i odpowiedzialności. Stawiamy na proaktywność, samodzielność, dobrą komunikację i pracę zespołową. Jeśli szukasz miejsca, w którym masz realny wpływ - prześlij swoje CV 📩 🔧  Szukamy osoby, która ma: Minimum 3 lata komercyjnego doświadczenia z Pythonem, w tworzeniu aplikacji webowych (warunek konieczny) Praktyczne doświadczenie z FAST API Umiejętność budowania rozwiązań AI w oparciu o frameworki typu LangChain/LangGraph Podstawową wiedzę z zakresu prompt engineering Praktyczną znajomość PostgreSQL Biegła znajomość systemu kontroli wersji (GIT), przy użyciu np. GitHub Potrafi używać AI jako wsparcia podczas pisania kodu.(np. GitHub Copilot, Claude Code) Wysokie umiejętności komunikacyjne, samodzielność i nastawienie na rozwój Język polski biegły; j. angielski min. B2 (codzienna komunikacja) Nice to have: Praktyczna umiejętność pracy w środowisku AWS Umiejętność delegowania i zarządzania pracą agentów AI Doświadczenie w zakresie wektorowych baz danych (np. pgvector) Wiedza w zakresie monitoringu (np. LangSmith, Sentry, CloudWatch) Doświadczenie w pracy w modelu SDD (Spec-Driven Development) 🚀 Co będziesz robić na co dzień Tworzyć mikrousługi (FastAPI + PostgreSQL) Tworzyć nowe funkcje i integrować je z istniejącą bazą kodu Testować i debugować kod w celu zapewnienia jego poprawnego działania Skupiać się na jakości rozwiązań i doświadczeniu użytkownika Rozwijać umiejętności tworzenia wydajnych i skalowalnych systemów AI Współpracować z AI Tech Leadem oraz zespołem backend Projektować nowoczesne systemy oparte m.in . na RAG, A2A, MCP Wdrażać i usprawniać wewnętrzną bazę wiedzy w ramach podejścia SDD (Spec-Driven Development) 💡 Co oferujemy Wynagrodzenie: 12 600 - 19 320 zł netto B2B, zależnie od umiejętności oraz ocenionego poziomu Realny wpływ na decyzje techniczne Pracę z zespołem doświadczonych inżynierów (backend, frontend, QA, DevOps) Bliskość AI i szansa na zdobycie doświadczenia z LLM i agentami autonomicznymi Zaufanie i autonomię, nie tracisz czasu na procedury Merytoryczne dyskusje i szybki feedback - każdy głos się liczy Rozwój miękki i techniczny - warsztaty, dostęp do kursów i wiedzy eksperckiej Elastyczne godziny i core hours 10:00 - 15:00 Pracę zdalną lub hybrydową, 1-2 dni w tygodniu z biura (biuro w centrum Bielsku-Białej - kawa, ekspres, gry, wygodne stanowiska 😉) 🧩 Jak wygląda proces rekrutacji? Rozmowa wstępna z HR Business Partnerem, telefonicznie - 10-15 minut, część w j.angielskim Spotkanie techniczne (część w j. angielskim) - rozmowa + zadanie praktyczne Spotkanie z HR Business Partnerem - podczas którego poznamy się lepiej, porozmawiamy o Twoim doświadczeniu i o tym, co możemy zrobić wspólnie. 📩 Chcesz do nas dołączyć? Wyślij swoje CV! Przejrzymy każde zgłoszenie z uwagą - odezwiemy się do kandydatów, z którymi chcielibyśmy porozmawiać.