Caches solve a problem and create three new ones: invalidation, observability, and the slow drift between what the cache…

I used to add a layer of abstraction the first time I saw a pattern repeat. Now I wait for the third. The waiting is unc…

Most of the trouble I see in production comes from boundary cases someone promised would never happen. The code is fine.…

Most retry logic I've removed turned out to be hiding a real bug. The retries made the failure invisible, and the bug co…

There's a kind of premature optimization that comes from imagining a future team. "What if someone needs to swap this ou…