.NET Backend Development
Production-grade REST APIs, background services, and data layers built with ASP.NET Core, C#, and Entity Framework. Freelance developer based in Berlin — available for projects worldwide.
What I Build
REST APIs
Clean, documented ASP.NET Core APIs with Swagger/OpenAPI, proper error handling, and versioning.
Authentication Systems
JWT authentication, refresh token rotation, 2FA, and role-based access control (RBAC).
Database Design
Entity Framework Core with SQL Server or PostgreSQL — schema design, migrations, and query optimisation.
Background Services
.NET hosted services for scheduled jobs, message queue consumers, and data sync workers.
Third-Party Integrations
Jira, Azure DevOps, SendGrid, Stripe, and other APIs integrated cleanly into your backend.
Docker & CI/CD
Containerised deployments with Docker Compose and automated pipelines via GitHub Actions.
Tech Stack
Why hire me for .NET backend work?
- →Verified 100% Job Success Score — consistent delivery of backend systems that work reliably in production.
- →I write tests by default — past projects include 24 and 60-test suites with 98% code coverage.
- →Security is built in from the start: JWT refresh rotation, RBAC at the controller layer, input sanitisation.
- →I document APIs with Swagger/OpenAPI so your frontend team or future developers aren't guessing.
- →Experience with government-grade systems (Embassy of Kenya) and enterprise integrations (Jira + Azure DevOps).
Frequently Asked Questions
What .NET version do you use?
I work with modern .NET — primarily .NET 8 and .NET 9 with ASP.NET Core. I also have experience migrating legacy .NET Framework projects to the modern unified runtime.
Do you write tests for .NET backend projects?
Yes. I write unit and integration tests with xUnit by default. Past projects include test suites with 60+ tests and 98% code coverage.
Can you build a secure authentication system with .NET?
Yes. I implement JWT authentication with refresh token rotation, role-based access control (RBAC), and 2FA. Security is built in from the start, not bolted on later.
Which databases do you work with?
Primarily PostgreSQL and SQL Server via Entity Framework Core. I handle schema design, migrations, and query optimisation as part of the engagement.
Need a .NET or C# backend developer?
Based in Berlin · Available for remote projects worldwide · Responds within 24h
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