Senior .NET / C# Developer (all genders)

• Develop clean, maintainable, testable, and reusable C# code based on business requirements and user stories
• Design, develop, and maintain applications using ASP.NET Core MVC, ASP.NET Core Razor Pages, and Entity Framework Core.
• Design and implement RESTful APIs following best practices and scalable architecture principles
• Contribute to frontend development using HTML5, CSS, Bootstrap, JavaScript, and TypeScript
• Work with SQL Server, including data modelling, query optimization, and performance tuning
• Implement automated tests (unit and integration) to ensure software quality
• Collaborate using Git-based workflows and participate in code reviews
• Contribute to CI/CD pipelines and automated deployments
• Work with Microsoft Azure services and cloud-based architectures
• Analyze, troubleshoot, and resolve technical and performance issues
• Contribute to continuous improvement of code quality, architecture, and development processes

• Strong professional experience with C# and the .NET ecosystem
• Hands-on experience with .NET Framework (maintenance and enhancement of legacy applications) and .NET 8+ / ASP.NET Core for modern application development
• Solid experience with ADO.NET and Entity Framework Core
• Experience designing and building RESTful APIs
• Strong knowledge of SQL Server, relational database design, and query optimization.
• Experience with frontend technologies (HTML5, JavaScript/TypeScript, CSS)
• Experience with automated testing frameworks (e.g., xUnit, NUnit, MSTest)
• Good understanding of software architecture principles and design patterns
• Experience using Git in collaborative development environments
• Familiarity with CI/CD pipelines and tooling
• Experience with Microsoft Azure
• Experience working in agile development environments
• Strong problem-solving skills and focus on code quality
• Good command of English and German

Benefits

• We currently offer the Deutschlandticket on a 100% basis (available to employees only)
• We currently offer membership of Urban Sports (available to employees only)
• Fresh fruit baskets, hot and cold drinks in our office
• An international, dynamic, committed and supportive team
• An office located right next to Berlin’s main railway station Hauptbahnhof, designed in the style of a co-working space
• Hybrid Working
• Opportunities for personal and professional development
• A secure job in a company that has enjoyed a steady success story since its foundation in 2011

You will work in a skilled and collaborative environment using modern Microsoft technologies (.NET 8+) to build reliable, maintainable, and high-quality software solutions. As a full-stack developer, you will contribute across the entire application stack, with a primary focus on backend services and APIs, while also supporting frontend development where needed.