Short, opinionated write-ups on distributed systems, event-driven architecture, and the gritty middle of shipping production infrastructure. Notes from the Ads & Promotions trenches at DoorDash.
Notes from a year of moving a synchronous service into a Publisher → Topic → Consumer pipeline: picking partition keys, surviving rebalances, getting idempotency right, and what we actually put in our DLQ.
$ wc -l posts/*.md → 1 published.