Blog

05 articles

Articles for developers: architecture, mapping, mobile, fintech and lessons from the field.

Idempotency: the property that protects your payments from double taps

The network drops, the user tries again, the client retries the request: in a payment system, any request may arrive twice. Idempotency guarantees it is only carried out once.

5 November 2026Read the article

#SIG#PostGIS 2 min read

Vector tiles with PostGIS: serving a whole country's map

Roads, buildings, points of interest: a country in OpenStreetMap is millions of features. Here's how to serve them as vector tiles straight from PostGIS, without bringing the server down.

5 November 2026Read the article

#IA#Agents 3 min read

AI agents in production: the loop, the tools and the guardrails

An agent is a language model that decides its own next action. That's powerful, and it's exactly why it needs boundaries. What I've learned from wiring agents into real systems.

5 November 2026Read the article