Profiling React Renders Without Guessing
Stop sprinkling memo() everywhere. The Profiler tells you which components actually re-render and why.
Archive
Older posts
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Designing an Idempotent Job Queue
At-least-once delivery means your jobs will run twice. Design for it instead of hoping it won't happen.
Rate Limiting with a Token Bucket
A token bucket gives you smooth rate limits with burst tolerance in about a dozen lines. Here is the whole thing.
Securing Our API with Short-Lived JWTs
Long-lived tokens are a liability. We moved to 10-minute access tokens with rotating refresh tokens — here is the tradeoff.
Lessons from Sharding PostgreSQL
Sharding bought us headroom and a pile of new problems. Pick your shard key like your job depends on it — because it does.
Adopting Server Components: What We Learned
Server Components moved data fetching off the client and shrank our JS — but the mental model took a minute.