Architecture

Decisions that cost or save a lot later — with the options I rejected and why.

2026-10-27 · Architecture

Transactional outbox in a messenger: seven phases, not one changed frame

Write to the database first, then send the event: that works until the process crashes right in between. So in a messenger I moved the side effects into an outbox.

2026-10-26 · Architecture

A job queue and search in three languages without new services: what PostgreSQL can do

Five new features for a messenger that teams install on their own server with one command. Each could have dragged in a service of its own. In the end, none was added.

2026-10-19 · Architecture

When the guest’s local time is stored as UTC

A booking platform was about to grow from one country to several. Then “3 pm” has to mean 3 pm wherever the party takes place, everywhere. The review found an error that was invisible in a single country.

2026-10-16 · Architecture

A marketplace answered every address with 200

An SEO audit without Search Console access: only what a search engine sees from outside, and the code. The biggest error was a single line.

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