#backend

Articles tagged with #backend

Static markup versus a Button that already has state, focus, and a theme
The wiring left after a Tailwind UI paste, from the live compare page. Variants, focus, dark mode, className overrides, and the React-only limit.
Sep 28, 20267 min read
Delete one tenant's files without scanning a shared Blob store
A multi-tenant app on Vercel can keep every customer's files in one Blob store under a pathname prefix, or give each customer a store. On 23 September 2026 Vercel removed the caps of 100 stores on Hob
Sep 26, 20268 min read
Write the outbox row in the same Postgres transaction as the business row
A welcome email, a webhook fan-out, and a search-index update are the same problem. The route has decided the business row. Another system still has to hear about it. Commit the user, then publish to
Sep 25, 20268 min read1
An owned API stores idempotency keys in Postgres and replays the first response
A retry, a double-click, and a webhook redelivery are the same failure when the handler charges or inserts. The second attempt has to come back with the first result: a key, a row in Postgres, and a r
Sep 25, 20268 min read
When to cut traffic to a warm standby instead of a rolling replace
Rolling deploys are the default on an owned backend: one fleet, old and new serving together until the old instances are gone. Blue-green is the other move. A second stack stays warm, and you cut traf
Sep 25, 20267 min read
Queue backpressure on an owned backend: refuse the burst before the pool melts
Agent runs, vendor webhook fan-out, and retry storms arrive as a sudden pile of HTTP calls on an API you operate. The database pool and the worker processes behind that API are a fixed budget. Once ev
Sep 24, 20268 min read