Notes on building things.

How an underspecified request to digitize a branching paper-form process became a production workflow for divers and dive-centre staff.

The architecture of a school management API — a deliberately boring stack, uploads the server never touches, and one owner for every hard rule.

How I built an observable neuroevolution playground, replaced arbitrary steering with geometry, and learned that reward design was the real work.

Pharmacies take turns covering the night shift. Nhafarma helps people find the one on duty without waiting for a radio announcement or searching through online news.