Exactly-once is a lie, but the outbox pattern gets close
Why you can’t atomically write to Postgres and Kafka, and how the outbox pattern with idempotent consumers gets you exactly-once semantics.
Postgres
Drawing lines: how I carved Foreman into services
Why three binaries instead of one, Postgres as source of truth, and the transactional outbox seam between Postgres and Kafka.
Foreman: why I built a distributed job queue from scratch
The motivation and stack choices behind building a self-scaling distributed job queue from scratch.