How Username Availability Checks Answer in Milliseconds
How "username already taken" appears so fast: a canonical key, a Bloom filter, a Redis cache and a PostgreSQL unique index, built and measured.
#nestjs
Posts tagged #nestjs
NestJS Best Practices for 2026: A Practical Guide (Updated for NestJS 12)
A practical, up-to-date guide to structuring, validating, securing, testing and running NestJS apps, updated for NestJS 12.
Stop Logging Out Innocent Users: Building Production Refresh Token Rotation with Token Family Revocation in Redis
How to implement RFC 6749 OAuth 2.0 Security BCP in NestJS and Redis with atomic Lua scripts, concurrency grace windows, and SSR-safe session management.
Building a Production Remote MCP Server in NestJS: Connecting Claude Desktop and Cursor to Your SaaS
Why local stdio scripts fail in production, and how to build a stateless JSON-RPC 2.0 server over HTTP with bearer authentication, schema validation, and self-healing LLM error handling.
How to Hide Your Backend VPS IP Behind Vercel Using Next.js Rewrites
A step-by-step guide to proxying API requests and securing your backend with custom secret headers.
Implementing Two-Factor Authentication (TOTP) in NestJS: With Full Source Code
Build a real TOTP-based 2FA flow with NestJS, Passport, and PostgreSQL — secret generation, QR codes, backup codes, and the guard logic to tie it all together.
