Elsewhere
Where I publish
A few places I write, post and tinker in the open. Email is still the best way to reach me — but this is where the public stuff lives.
-
Blog
/blogLong-form essays and notes — software craftsmanship, AI-augmented engineering, and lessons from the things I build.
-
LinkedIn
felix-diez-ariasCareer updates and posts on .NET, architecture and engineering leadership.
-
Twitter / X
@felixdevelopsQuick takes, links and threads on software, AI and the craft.
-
GitHub
felixeu31Open-source experiments, this website, and my dev knowledge base.
Latest writing
- The Code Worked. The Design Was Still Wrong. A frontier model built my feature, the tests passed, it worked — and its design described a world that doesn't exist. What caught it was design knowledge, not tooling. Design still matters.
- Good Code Was Already Optimized for LLMs The principles that make code easy for humans to evolve are the same ones that make it cheap for LLMs to work with.
- Mastering Docker Networking: Solving Bidirectional Communication Between Containers and Host Services A practical guide to enabling seamless communication between containerized applications and host-based services
- The Hidden Cost of Azure SQL Databases: How You Could Lose Your $50 Free Credits Fast How switching an Azure SQL database from Serverless to DTU pricing turned a €50 spending-cap surprise into predictable, boring monthly billing.