April 25, 2026
Full Stack Python Developer
Senior • Remote
Warsaw, Poland
Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!
We are looking for a Fullstack Python Developer for our client — a company operating at the intersection of software engineering and scientific innovation.
What you will do:
Develop scalable frontend (TypeScript, React) and backend (Python, Django, Celery) applications.
Build and maintain REST and GraphQL APIs.
Solve complex engineering challenges related to scientific data and analysis workflows.
Collaborate with local and off‑shore teams in an agile, iterative environment.
Work with Postgres, MongoDB, and AWS cloud services.
Ensure high code quality through testing (pytest, optionally Playwright)
What we are looking for:
5+ years of experience in data‑focused software development within agile teams.
Strong skills in TypeScript/React and Python (Django, Celery).
Hands‑on experience with REST and GraphQL API development.
Proficiency with GitHub and relational/NoSQL databases (Postgres, MongoDB).
Experience working with AWS and modern cloud tooling.
Degree in bioinformatics, computer science, or a related field; biological knowledge is a plus.
Perks and benefits:
Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.
Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location.
Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.
Global collaboration - work with a diverse, international team.
Innovative environment - be part of a forward-thinking and growth-oriented workplace.
Engaging community – Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.
Team-building events including our company tradition (annual company event in Mazury).
A pleasant surprise to start your journey with us in the form of a welcome pack.
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Remote
Lublin, LU, Poland
🏢 Summary: Offer for an experienced .NET Developer to design and develop applications and databases within public sector IT projects, working in a SCRUM environment with strong focus on code quality and collaboration. The role involves backend development, integration services, testing, and technical documentation. The position also requires security clearance and readiness for extended verification procedures. 🗂️ Requirements: Minimum 3 years of experience in .NET development, Very good knowledge of C#, Experience with at least one backend framework: ASP.NET MVC, WPF, SignalR, WCF, ASP.NET Core, or Web API, Knowledge of object-oriented design principles and best practices (SOLID, DRY, Clean Code), Experience with TDD, Proficiency with Visual Studio, Experience with Entity Framework or other ORM, Experience with relational SQL or NoSQL databases, Experience in building REST, SOAP, or SignalR services, Basic knowledge of React, Angular, or Vue, Experience with CI/CD tools, static code analysis, test coverage tools, xUnit or NUnit, and Git, Security clearance for access to classified information ("confidential"), Readiness to undergo extended clearance procedure for higher-level classified information 📃 Skills: .NET, C#, ASP.NET, MVC, WPF, SignalR, WCF, ASP.NET Core, Web API, SOLID, DRY, Clean Code, TDD, Visual Studio, Entity Framework, ORM, SQL, SQL Server, PostgreSQL, NoSQL, REST, SOAP, React, Angular, Vue, CI/CD, xUnit, NUnit, Git, SCRUM 🏢 Description: Billennium to globalna firma technologiczna z ponad 20-letnim doświadczeniem, zaangażowana w innowacje i wspieranie przedsiębiorstw. Jako pracodawca oferujemy wspierające, nastawione na rozwój środowisko, w którym współpraca i kreatywność to naczelne wartości. Dołącz do nas, aby wspólnie kształtować przyszłość technologii! Kogo szukamy? Do naszego zespołu poszukujemy doświadczonej osoby na stanowisko .NET Developera, która wesprze nas w realizacji projektów IT — w obszarze public. Zakres zadań: Projektowanie oraz rozwijanie aplikacji i baz danych w ramach realizowanych projektów. Przygotowywanie estymacji prac, wskazywanie potencjalnych trudności i możliwych zagrożeń realizacyjnych. Opracowywanie planów testów oraz ich wykonywanie w celu zapewnienia poprawności działania tworzonych rozwiązań. Dbanie o utrzymanie wysokiej jakości kodu, w tym udział w przeglądach i weryfikacji pracy innych programistów. Udzielanie wsparcia technicznego oraz dzielenie się wiedzą z członkami zespołu. Bieżąca współpraca z analitykami biznesowymi, architektami, projektantami UX i testerami przy tworzeniu nowych funkcjonalności. Przygotowywanie dokumentacji technicznej dla tworzonych komponentów i usług. Realizacja zadań zgodnie z obowiązującymi standardami technicznymi i metodyką pracy SCRUM. Niezbędne umiejętności i kwalifikacje: Minimum 3 lat doświadczenia w programowaniu w środowisku .NET Bardzo dobra znajomość języka C#. Praktyczne doświadczenie w pracy z co najmniej jedną technologią lub frameworkiem backendowym: ASP.NET MVC, WPF, SignalR, WCF, ASP.NET Core, Web API. Bardzo dobra znajomość zasad projektowania obiektowego oraz stosowanie dobrych praktyk (SOLID, DRY, Clean Code), oraz doświadczenie w stosowaniu TDD. Swoboda w pracy z środowiskiem Visual Studio Doświadczenie w korzystaniu z Entity Framework lub innego ORM. Praktyka w tworzeniu aplikacji korzystających z relacyjnych baz SQL (np. SQL Server, PostgreSQL) lub baz NoSQL. Doświadczenie w tworzeniu usług opartych o REST, SOAP lub SignalR. Podstawowa znajomość jednego z frameworków front-end: React, Angular, Vue. Doświadczenie w korzystaniu z narzędzi wspierających proces wytwarzania oprogramowania (CI/CD, statyczna analiza kodu, pokrycie testów, xUnit/NUnit oraz Git). Poświadczenie bezpieczeństwa dostępu do informacji niejawnych o klauzuli poufne; Gotowość na przeprowadzenie rozszerzonego postępowania sprawdzającego w zakresie dostępu do informacji niejawnych o klauzuli tajne i ściśle tajne; Nasza oferta: Pakiet benefitów pozapłacowych — Udemy for Business, prywatna opieka medyczna, karta Multisport, pakiet weterynaryjny, lekcje językowe, bony zakupowe Elastyczność — elastyczne godziny pracy i opcje pracy zdalnej/hybrydowej dostosowane do Twojego stylu życia i lokalizacji Rozwój kariery — dostęp do szkoleń i certyfikacji, współpraca z globalnymi partnerami IT (Microsoft, AWS, Snowflake, Salesforce) Angażująca społeczność — udział w wydarzeniach team buildingowych, hackathonach i inicjatywach CSR Firmowe tradycje — coroczne wydarzenie integracyjne na Mazurach Czekamy właśnie na Ciebie!
Technology
Billennium
Fullstack Developer
Senior
Remote
Warsaw, Poland
🏢 Summary: Long-term Fullstack Developer role focused on building and maintaining web applications, backend services, and APIs for regulated healthcare and life sciences environments. The position involves fullstack development with Java and Angular technologies, testing, deployment support, and collaboration in agile cross-functional teams. The offer includes flexible work options, professional development opportunities, and international collaboration. 🗂️ Requirements: Java proficiency, SQL proficiency, JDBC experience, Hibernate experience, Swing experience, Angular 19+ proficiency, TypeScript proficiency, SCSS knowledge, Jest experience, NgRX experience, ng-bootstrap experience, GitLab experience, JBoss knowledge, RedHat knowledge, Oracle DB experience, SOAP services experience, Experience in GxP-compliant environments, Understanding of GxP principles and regulatory processes, Ability to work in agile cross-functional teams 📃 Skills: Java, SQL, JDBC, Hibernate, Swing, Angular, TypeScript, SCSS, Jest, NgRX, ng-bootstrap, GitLab, husky, commitlint, prettier, eslint, JBoss, RedHat, Oracle, SOAP 🏢 Description: We are looking for an experienced Fullstack Developer who will join a long-term project for our client global organization operating in the life sciences sector, developing solutions that support highly regulated processes in healthcare and research. What you will do - Develop and enhance web application features as well as backend services and APIs based on business, functional, and technical requirements. - Collaborate closely with frontend and backend engineers, as well as other stakeholders, to ensure seamless integration and optimal performance. - Participate in requirement analysis and contribute to technical estimations and planning. - Design and implement reusable UI components, as well as backend components and workflows, ensuring consistency and maintainability. - Write and maintain unit tests; identify, troubleshoot, and resolve defects across development, system testing, and UAT phases. - Support deployments to lower environments and assist with release readiness, system testing, and user acceptance testing. - Contribute to testing strategy, automation initiatives, and continuous improvement of code quality. - Document technical decisions and ensure alignment with internal standards, compliance requirements, and regulatory expectations. What we are looking for - Strong proficiency in Java, SQL, JDBC, Hibernate, and Swing. - Proficiency in Angular 19+, TypeScript, SCSS, Jest, NgRX, and ng-bootstrap. - Experience with development tools and environments such as GitLab, husky, commitlint, prettier, eslint, JBoss, RedHat, Oracle DB, and SOAP-based services. - Experience working in GxP-compliant environments and validated IT systems. - Solid understanding of GxP principles, documentation standards, and regulatory processes. - Ability to work independently and effectively in cross-functional, agile teams. - Strong communication, problem-solving skills, and attention to detail. Perks and benefits - Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers. - Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location. - Career growth - access opportunities for professional development and learning, including perks related to official partnerships with Microsoft, AWS, Snowflake, Salesforce & more. - Global collaboration - work with a diverse, international team. - Innovative environment - be part of a forward-thinking and growth-oriented workplace. - Engaging community – work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives. - Team-building events including annual company events. - Welcome pack provided at the start of employment.
Technology
BILLENNIUM SPÓŁKA AKCYJNA
System Maintenance Specialist
Mid
Remote
Warsaw, Poland
🏢 Summary: Senior web application developer role focused on building and maintaining internal business applications, cloud-based systems, and containerized solutions in Agile teams. The position involves PHP/Laravel and Vue.js development, API integrations, MDM platform administration, and deployment on Azure and AWS. The offer includes flexible work options, professional development opportunities, and collaboration in an international environment. 🗂️ Requirements: 3+ years of web application development experience, Strong PHP proficiency, Hands-on Laravel experience, Experience with Vue.js, Experience with HTML, Experience with CSS, Experience with MySQL, Experience with Azure or AWS deployments, Experience with containerized applications, Knowledge of REST APIs, Experience with system integrations, Experience in Agile/Scrum environments, Ability to work in remote teams 📃 Skills: PHP, Laravel, Vue.js, HTML, CSS, MySQL, Azure, AWS, REST, Docker, MDM, Scrum, Agile 🏢 Description: Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together! Develop and maintain internal web applications and digital tools that support business operations. Collaborate with cross-functional Agile teams to enhance system functionality, improve operational efficiency, and ensure reliable administration of enterprise platforms. Design, implement, and optimize cloud-based and containerized solutions while integrating internal systems through APIs. Responsibilities Develop, maintain, and optimize internal web applications and digital tools. Collaborate with the Scrum team to refine requirements and deliver sprint objectives. Support and enhance business-critical applications used in daily operations. Maintain automated data ingestion and parsing solutions. Integrate Mobile Device Management (MDM) platforms with internal systems. Implement continuous improvements throughout the application lifecycle. Administer Mobile Device Management (MDM) and Customer Support platforms. Deploy and manage cloud applications on Azure and AWS. Develop and maintain containerized applications. Troubleshoot production issues and optimize application performance. Build and customize web applications using PHP, Laravel, Vue.js, HTML, CSS, and MySQL. Requirements 3+ years of experience in web application development. Strong proficiency in PHP, with hands-on experience using Laravel. Experience with Vue.js, HTML, CSS, and MySQL. Experience deploying and managing applications on Azure or AWS. Experience developing and maintaining containerized applications. Knowledge of REST API development and system integrations. Ability to deliver technical solutions using modern technologies. Experience working in Agile/Scrum environments. Strong collaboration and communication skills in remote teams. Perks and benefits: Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers. Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location. Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more. Global collaboration - work with a diverse, international team. Innovative environment - be part of a forward-thinking and growth-oriented workplace. Engaging community – Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work. Team-building events including our company tradition (annual company event in Mazury ). A pleasant surprise to start your journey with us in the form of a welcome pack. Recruitment process: HR call Technical Interview Interview with the dedicated Client Final decision/ Feedback Sounds interesting? Click "Apply" and have a chance to hear more! Your skills & experience Our offer Your role Seniority Area of expertise Technology stack (Tags) Others (pictures etc.)