NestJS

Everything written here on NestJS, newest first. These are build notes from real client work: what shipped, what broke, and what it cost to fix.

Real DB vs In-Memory in Tests: A Decision Table for NestJS Engineers

In-memory DBs make your test suite fast and your production bugs invisible. Here is a practical decision table for when to use each in NestJS.

2026-10-047 min read

NestJS Provider Scopes and the Traps That Catch You in Production

DEFAULT, REQUEST, and TRANSIENT scopes look simple. Here is where each one quietly breaks your NestJS app - and the checklist to avoid the common traps.

2026-09-137 min read