Development and further development of backend services and APIs using C# and .NET
Design and implementation of REST interfaces
Work with relational databases (e.g., PostgreSQL, MS SQL)
Active shared responsibility for the production operation of your applications
Possible contribution to UI components in the .NET ecosystem (e.g., ASP.NET MVC, Blazor)
Analyze and sustainably resolve bugs and performance issues
Maintain and evolve established codebases
Identify technical debt and provide informed assessments of when refactoring is appropriate and when it is not
You take end-to-end responsibility for your services (deployments, monitoring, troubleshooting) — without on-call duty
Contribute to technical decisions within the team with a focus on maintainability and operations
Knowledge sharing and close collaboration in a small, empowered team

Several years of experience as a software developer with C# / .NET
Strong knowledge of object-oriented software development
Experience with ASP.NET Core and ORMs such as Entity Framework
Confident working with relational databases
Experience in designing and consuming REST APIs
Willingness to work in existing .NET codebases (e.g., .NET 4.8) and gradually modernize them
Regular use of AI tools to support daily development tasks
Experience with message brokers (e.g., RabbitMQ), Blazor, or MVC is a plus but not required
Initial exposure to Docker, CI/CD, or Kubernetes is an advantage
Understanding of Clean Code principles, maintainable architectures, and automated testing
Ability to navigate existing codebases confidently and independently
Experience from product-focused environments (e.g., FinTech, platforms, SaaS) is a plus

Company pension plan and 30 days of annual leave per year (based on a 5-day workweek)
Attractive workplace with regular after-work and team events and the option to bring dogs to the office
Fresh, free daily lunch, drinks, snacks, as well as fruit and vegetables

C# Backend Developer – .NET

Key skills