Notes, guides, and engineering deep dives from real-world backend, cloud, and system design work.

A practical guide for enginners who know indexes exists but want to understand how they work, when planner ignores them and how to stop shooting yourself in the foot with too many of them.

Discover how tries power autocomplete, longest prefix match, and smart lookup in real-world backend services.

Learn how to connect to ec2 instances without ssh, using aws ssm.

Learn how to schedule cron jobs in PostgreSQL.

Building realtime web applications with socket and database triggers using pg_notify in a Node.js application.