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Senior .NET Developer Miejsce pracy: Warszawa Technologies we use Expected .NET SQL MySQL Microsoft SQL Server AWS Operating system Windows About the project As a Senior .NET Engineer, you will build and support data-intensive systems that power solutions for professional sports. You’ll play a key role in shaping how data and technology drive performance insights across multiple sports. You will take technical ownership of our individual sport products, including our existing Darts offering, while also contributing to the evolution of our multi-sport platform supporting sports such as basketball, handball, and hockey. The role focuses on backend API development and end-to-end system ownership, working across complex, distributed systems with an emphasis on scalability, performance, and security. This is a hands-on senior engineering role within an international environment that values collaboration, accountability, and technical excellence. ABOUT YOU You’re a developer who thrives on solving complex challenges and delivering clean, scalable solutions. You bring deep expertise in C# and the latest .NET technologies, and you approach architecture with clarity and purpose — using design patterns not just as tools, but as guiding principles. You’ve spent 5–10 years honing your craft in software engineering. You take ownership of your work, lead yourself with confidence, and stay focused even when working independently. You’re a natural problem-solver who enjoys fixing things, not just building them. You communicate clearly, collaborate effectively, and bring a sense of responsibility to everything you do. You’re curious, self-motivated, and always learning — whether it’s new tech, better practices, or the people around you. You’re not afraid to step outside your comfort zone and embrace growth opportunities. Your responsibilities Creating flexible systems that work across a variety of sports Take ownership in shaping and delivering key features and products whilst working alongside the Product team Write high-quality, maintainable, and testable code, increasing unit test coverage and confidence Lead the development of software services optimized for deployment into AWS Collaborate with and become integral to a cross-functional team of Product, Design, Engineering, and System Administration Meet regularly with Security members to review service needs and improvements Our requirements 5-10 years of professional experience of software development using .NET Strong experience with SQL-based databases such as SQL Server, MySQL, or similar relational databases Experience with designing, consuming and writing APIs Experience working with AWS key services (for example: ECS Fargate, S3, SES, EC2) Creative and self-motivated engineer with excellent coding and design skills You are always mindful of quality attributes like maintainability, performance, security, scalability, usability, and testability. As a result, you have successfully contributed to the architecture and UI/UX proposals and decisions. Adherence for frontend architecture and good practices with experience using MVC, JQuery & Bootstrap This is how we organize our work This is how we work in house you focus on a single project at a time you develop several projects simultaneously you have influence on the choice of tools and technologies you have influence on the technological solutions applied you have influence on the product you focus on product development you focus on code maintenance agile This is how we work on a project Clean Code BDD TDD Continuous Deployment Continuous Integration team-level deployment documentation testing environments Development opportunities we offer development budget industry-specific e-learning platforms intracompany training substantive support from technological leaders technical knowledge exchange within the company What we offer A collaborative environment with colleagues from all over the world (offices in Europe, Australia and US) including various social events and teambuilding Flexibility to manage your workday and tasks with autonomy A balance of structure and autonomy to tackle your daily tasks Vibrant and inclusive community, including Women in Tech and Pride groups which welcome all participants Global Employee Assistance Programme Calm and Reulay app (leading well-being apps designed to support focus, quality rest, mindfulness, and long-term mental resilience) Online training videos Flexible working hours While we appreciate the flexibility and benefits of working from home, we strongly believe that coming together in person fosters stronger connections, encourages collaboration, and drives innovation—both as individuals and as a company. The energy, shared ideas, and team support we experience in the office strengthen the foundation of our success and culture. For this reason, we are an office-first business operating on a hybrid model, with team members working in the office three days a week to build relationships, exchange ideas, and grow together Benefits flexible working time fruits integration events no dress code coffee / tea drinks Recruitment stages Initial Screening A short call with our Talent Acquisition Partner Technical Interview Meet the team youll work with Team Fit Interview (onsite optional) Chat with the unit leaders to explore team dynamics 1.Initial Screening 2.A short call with our Talent Acquisition Partner to align on your experience and expectations. 3.Technical Interview 4.Meet the team youll work with — a Q&A session plus time for your questions. 5.Team Fit Interview (onsite optional) 6.Chat with the unit leaders to explore team dynamics and direction and also a chance to meet in person with our VP of Engineering. Additional Information At Sportradar, we celebrate our diverse group of hardworking employees. Sportradar is committed to ensuring equal access to its programs, facilities, and employment opportunities. All qualified applicants will receive consideration for employment without regard to age, race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. We encourage you to apply even if you only meet most of the requirements (but not 100% of the listed criteria) – we believe skills evolve over time. If you’re willing to learn and grow with us, we invite you to join our team! Sportradar Polska Sp. z o.o. We’re the world’s leading sports technology company, at the intersection between sports, media, and betting. More than 1,700 sports federations, media outlets, betting operators, and consumer platforms across 120 countries rely on our know-how and technology to boost their business. Klikając w przycisk „Aplikuj” lub w inny sposób wysyłając zgłoszenie rekrutacyjne, zgadzasz się na przetwarzanie Twoich danych osobowych przez Sportradar Polska Sp. z o.o. z siedzibą w: Hrubieszowska 2, 01-209 Warszawa (Pracodawca), jako administratora danych osobowych w celu przeprowadzenia rekrutacji na stanowisko wskazane w ogłoszeniu. Twoje dane osobowe będą przetwarzane w oparciu o następujące podstawy prawne: (a) aby podjąć działania na Twoje żądanie przed zawarciem umowy (np. informacje o oczekiwanym wynagrodzeniu i dostępności do rozpoczęcia pracy); (b) w oparciu o nasz prawnie uzasadniony interes (np. imię, nazwisko, data urodzenia, dane kontaktowe, wykształcenie, kwalifikacje zawodowe, przebieg dotychczasowego zatrudnienia); c) w oparciu o Twoją zgodę, która wyrażona jest poprzez przeslanie dokumentów aplikacyjnych zawierających takie informacje jak np. wizerunek czy zainteresowania.Podanie wszystkich danych osobowych, o których mowa powyżej jest dobrowolne, natomiast dane wymienione w lit. a) i b) są niezbędne do wzięcia udziału w rekrutacji. Niepodanie danych skutkuje brakiem możliwości rozpatrzenia kandydatury. Podanie pozostałych danych jest dobrowolne, ale może pomóc w sprawnym przeprowadzeniu procesu rekrutacji.Masz prawo żądać dostępu do Twoich danych (w tym uzyskania ich kopii), sprostowania danych, ich usunięcia, ograniczenia przetwarzania, przeniesienia, jak również wniesienia sprzeciwu wobec ich przetwarzania. Masz także prawo wniesienia skargi do Prezesa Urzędu Ochrony Danych Osobowych.Twoje dane osobowe mogą zostać przekazane dostawcom usługi publikacji ogłoszeń o pracę, dostawcom systemów do zarządzania rekrutacjami, dostawcom usług IT (hosting), dostawcom systemów informatycznych.Podane przez Ciebie dane osobowe nie będą wykorzystywane w celu profilowania albo podejmowania decyzji w sposób zautomatyzowany.Twoje dane osobowe będą przetwarzane przez okres maks. 1 roku od zakończenia publikacji ogłoszenia, chyba, że wyraziłeś odrębną zgodę na wykorzystanie Twoich danych osobowych w przyszłych rekrutacjach.W celu realizacji praw lub w przypadku jakichkolwiek pytań związanych z przetwarzaniem Twoich danych osobowych skontaktuj się z nami pod adresem: info@sportradar.com.