Senior .NET Developer with German

Nasze wymagania: strong experience in C# development (5+ years) strong experience with WPF (5+ years) solid experience with REST services experience with Test Driven Development (TDD) good knowledge of Git experience with authentication protocols (OAuth/OIDC, Kerberos) experience working in Agile environments (Scrum or Kanban) strong ownership and senior-level experience in recent projects very good communication skills and team collaboration German language skills at least B2 Mile widziane: experience with UI libraries for WPF (e.g. Infragistics) experience with testing tools (e.g. Moq, FluentAssertions) experience working with complex or historized data familiarity with CI tools (e.g. Jenkins) experience with Material Design experience in public sector or healthcare-related projects basic DevOps knowledge O projekcie: We are looking for a Senior .NET Developer to join an Agile product team working on a modern Master Data Management (MDM) system. The project focuses on the development and enhancement of a desktop application used for managing and maintaining structured business-critical data. The application is built using C# and WPF and integrates with a central REST API. A strong emphasis is placed on user experience, modern UI (Material Design), and responsive application behavior. The system is actively developed and continuously improved in terms of architecture, code quality, and performance. You will join a self-organizing team of experienced engineers and product stakeholders, working in an Agile environment. Start date: 01.06.2026 Zakres obowiązków: develop and enhance a desktop application using C# and WPF implement new features based on business requirements improve UI/UX and overall application performance integrate and work with REST APIs maintain and modernize the application (libraries, tools, architecture) contribute to code quality improvements and best practices participate in testing strategy, including TDD and automated tests collaborate closely with the development team in an Agile setup Oferujemy: B2B contract long-term cooperation possibility hybrid work model (mostly remote + occasional on-site) work in an experienced, Agile team project with real impact on business-critical systems