Blog

A deep dive into debugging duplicate key errors in Sequelize with Postgres, including defensive code, transactions, and idempotent APIs.

My Stack Overflow write-up on cache invalidation, with mental models, ETags, and stale-while-revalidate examples for web apps.

Notes on using Server Actions in the App Router, covering mutations, form actions, and client/server data boundaries.

Symptoms, tooling, and real fixes when CPU-bound work blocks the event loop. Includes worker_threads and queueing examples.

A collection of patterns for scaling types: branding, discriminated unions, zod inference, and narrow/widen tactics.

Start with logs and slow query analysis; layer tracing for critical paths. Screenshots and example dashboards included.