I've been coding professionally for 20+ years. Today I write less code by hand and ship more than ever. AI changed how I build, and I write about that here. By day I'm CTO at Medullar, taking AI products from proof of concept to production: LLMs, RAG, federated search, agents, privacy-first systems. I still design the architecture and write a lot of the code. I'm also fractional CTO at Fent País, the company I co-founded.