Mid-Senior Backend Developer (C#/.NET)

We are looking for a Mid-Senior Backend Developer (C#/.NET) to join a long-term project for a German client. You'll work on a production ASP.NET Core system, owning backend features end-to-end and collaborating directly with the client's engineering team.
What you'll do:

• Design, build and maintain backend services in C# / ASP.NET Core
• Work with SQL Server (or PostgreSQL) for data storage and query optimization
• Design and implement REST APIs consumed by web and mobile frontends
• Write unit and integration tests, participate in code reviews
• Collaborate with frontend developers (Angular/Vue) on API contracts
• Participate in architecture discussions and technical decision-making

Requirements:

• 4+ years of commercial experience with C# / .NET (.NET 6+/ASP.NET Core)
• Strong SQL skills (SQL Server or PostgreSQL)
• Experience designing and consuming REST APIs
• Familiarity with Entity Framework Core or a similar ORM
• Understanding of clean architecture / SOLID principles
• English level C1, comfortable in daily communication with a German client

Nice to have:

• Experience with Angular or Vue on the frontend side
• Experience with Docker and CI/CD pipelines
• Experience with Azure or AWS

We offer:

• Competitive salary depending on experience
• Long-term project with a stable international client
• Flexible remote work, minimal bureaucracy
• Direct communication with the client's tech team, no unnecessary layers