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.
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Blog
/blogLong-form essays and notes — software craftsmanship, AI-augmented engineering, and lessons from the things I build.
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LinkedIn
felix-diez-ariasCareer updates and posts on .NET, architecture and engineering leadership.
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Twitter / X
@felixdevelopsQuick takes, links and threads on software, AI and the craft.
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GitHub
felixeu31Open-source experiments, this website, and my dev knowledge base.
Latest writing
- The Scale Broadcasts. The Agent Decides. My bathroom scale is a generic Xiaomi. It is now wired into every system I run — my server, my own tracker, my AI assistants — and it talks to them by itself. A whole IoT system, for a number on a bathroom floor.
- There Are a Million Fitness Apps. I Built My Own Anyway. A weight trend I can trust, a guided workout player, and a database my AI assistant reads and writes directly. Usable the same evening I started it. What changed isn't the market — it's the cost of building.
- 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.