About Me
Hi! I'm Marcel — a software engineer based in Cruquius, the Netherlands. I run Roozekrans IT-Solutions and have extensive experience in website and software development, with a deep focus on the .NET ecosystem.
I enjoy building open source libraries that make other developers' lives easier, with a particular interest in performance, source generators, and developer tooling. I studied Information Engineering at the Hogeschool van Amsterdam.
When I'm not writing code, you'll probably find me underwater — I'm a certified dive instructor (KSS3) and active member of Onderwatersport Vereniging Haarlem. I believe in writing software that is simple, fast, and well-tested.
Skills & Tech
Languages
- C#
- TypeScript
- JavaScript
- SQL
- PowerShell
Frameworks
- .NET 8/9/10
- ASP.NET Core
- Blazor
- Astro
AI
- Microsoft.Extensions.AI
- MCP
- RAG & embeddings
- OWASP LLM Top 10
Cloud
- Azure
- AWS
- Terraform
- Kubernetes
Tooling
- Roslyn
- Source Generators
- Native AOT
- Docker
- Git
Interests
- Open Source
- Performance
- Developer Tools
- Clean Architecture
Certifications
- MS: Programming in C# Specialist (70-483)
- MS: Querying Microsoft SQL Server (70-461)
- Cisco Certified Network Associate (CCNA)
Sponsor My Work
Everything I build is open source and free to use. Sponsorship is what lets me spend time on it instead of client work — it funds continued maintenance of the ZeroAlloc.NET packages, .NET version upgrades across every project, and more MCP servers and AI tooling for .NET developers.
Become a sponsor