Blog

Notes from real projects

Things we learned building data systems, written down so we don't learn them twice.

Idempotent pipelines: the one habit that saves your weekends

Why every job should be safe to re-run, and three patterns to get there.

Moving analytics from PostgreSQL to ClickHouse

What got faster, what got harder, and when you should not bother.

One metric, one definition

How three dashboards ended up with three different revenue numbers — and how we fixed it.