Backend
Node.js, FastAPI, PostgreSQL, MongoDB, Redis — the infrastructure layer that powers every user-facing feature.
- Why My Node.js API Calls Randomly Failed — And My Code Was FineA real debugging story about intermittent ETIMEDOUT errors, Cloudflare DNS, and a fix that took 5 minutes once I knew what to look for.
- Deploying a Full-Stack App on a VPS — The Right WayIf you're deploying your first real project, or you've deployed before but never felt confident about why you're doing what you're doing — this is for you
- Row Level Security in PostgreSQL: Multi-Tenant Data Isolation Done RightHow to implement per-tenant data isolation at the database layer using PostgreSQL RLS — without leaking data across tenants or killing performance.