Writing

Articles, tutorials, notes, and things I’ve shared elsewhere.

📌 Pinned

• article

  Where does the server.listen() callback actually run?

  Event-loop guides list the phases but never say where server.listen()'s callback lands. Node's source answers it: the nextTick queue, before promises and timers.

  Node.jsEvent loop

Latest

• article

  One cron job instead of thousands: a database-driven scheduler

  Per-user cron jobs ran into service limits and billing as users grew. One tick, a jobs table and FOR UPDATE SKIP LOCKED replaced them.

  System designPostgreSQLRabbitMQ