Beyond CRUD: A Practical Guide to Modeling Business Processes in REST APIs
Five patterns for modeling complex business processes in REST APIs, from nesting sub-resources to accepting RPC-style verbs when CRUD falls short.
Hi, I'm Ivan Kahl
Software Engineer, Writer & AI Enthusiast
I'm a software engineer who learns in public. I write in-depth guides and share my perspectives on software and AI on my blog, YouTube and TikTok, and I've written 31 articles for 21 developer companies.
Featured Blog Posts
8 NDepend Rules to Enforce Domain-Driven Design in .NET
Eight NDepend CQLinq rules automate Domain-Driven Design enforcement in .NET, protecting architectural boundaries, entities, and aggregate roots.
Decompiling the New C# 14 field Keyword
The IL code behind the C# 14 field keyword reveals how it removes property boilerplate, and which caveats matter before refactoring an existing codebase.
Mastering the C# Dispose Pattern
Reliable resource management in C# depends on IDisposable. Implementing it correctly cleans up unmanaged resources like file handles and connections, and prevents leaks.
Freelance writing for developer companies
31 articles for 21 developer-focused companies, covering tutorials, deep dives and guides on .NET, AI tooling, APIs and DevOps.
View all freelance articlesWhat I do
Software engineering
By day, I’m a Senior Software Engineer at Entelect, designing and building maintainable systems for a range of South African companies.
Writing
In-depth technical posts on my own blog, plus freelance articles written for other publications.
Video content
Long-form and short-form videos on AI and software engineering, published on YouTube and TikTok.
Artificial intelligence
AI runs through everything I do: applying it to engineering work, building applications powered by it, and enabling others by teaching the principles behind it.
- AI-applied engineering: using agentic workflows and tools like Claude Code and Codex to ship faster and more reliably.
- AI-powered applications: LLM features, MCP servers and data extraction pipelines built into real .NET and Node.js services.
- Teaching AI principles: helping other developers understand how AI works and get the most out of it, through videos and articles.
Got something on your mind?
Reach out if you have a technical question, want me to write for you, or would like to collaborate on a video or project. I'm also happy to hear feedback on my work, or just to say hi.