A secure NestJS + Prisma API starter, piece by piece
Most NestJS tutorials stop at nest new and a controller. The part that takes time is everything that wraps the controllers: security headers, a CORS…
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My NestJS app "hung" on startup and printed nothing - it was dead all along
Few months ago I started one of my Nest services in watch mode and got... nothing. No error, no "Nest application successfully started", no stack. T…
One-Time Access Tokens: What If Every API Request Burned Its Token?
A stolen token doesn't need your password or your MFA code. Whoever holds it is, as far as your API can tell, you. This post compares three ways of…
Why in-memory MCP sessions fail behind a load balancer (NestJS demo)
By Shilpa Mareddy Two copies of an MCP (Model Context Protocol) server (a server that AI applications call tools on) sit behind a round-robin load b…
@Cron fires on every replica. I found out the boring way
How an in-process scheduler turned one nightly job into N duplicate writes, and why I moved scheduling out of the app entirely. I was looking at sta…
Building a Temporary Message Sharing API with NestJS, PostgreSQL, Prisma & Redis
I recently built a temporary message-sharing API from scratch using NestJS, PostgreSQL, Prisma and Redis . The idea is simple: Create a message, gen…
Getting a NestJS app's logs into Elasticsearch without writing grok
My team is rolling out ELK observability across four services, and I drew the short straw of instrumenting the first one: a NestJS API. I expected a…
Building a Choose-Your-Own-Adventure API with NestJS — Part 2: Persistence
Part 2 of a series building "Grimoire API" — a choose-your-own-adventure backend in NestJS, learned one milestone at a time. Part 1 covered controll…
Generalizing Transactions in NestJS: A Domain Port over TypeORM and MongoDB
Transaction control usually starts out tied to whatever implements it. An executor — a concrete class that opens a transaction over the project's OR…
Tracing NestJS Pricing Flags via HTTP (Custom Logger Correlation Events)
Short answer: send structured log events from the NestJS custom logger to a backend API asynchronously, give every event a correlation ID that survi…
I Wired the Boring 80% So You Can Build the Interesting 20%
Built for the AI era: a production-ready TypeScript modular monolith with guardrails for robot coworkers. Every new project starts the same way. You…
Moleculer vs NestJS: which one, and when
If you are choosing a framework for a Node.js backend that will be more than one service, you will end up comparing NestJS and Moleculer. People ask…
Building a TypeScript Code Radar: What an AST Reveals That Text Search Misses
Today I started experimenting with Tree-sitter . I had heard the name before, but I had never actually used it. My goal was simple: take a TypeScrip…
Redora 0.3.1 — Redis for NestJS
There are already good Redis tools for NestJS. Most of them mainly help you connect NestJS to Redis and use the Redis client. That's useful, but as…
The Criteria pattern in NestJS: what a client may ask for is a file, not a signature
The Criteria pattern in NestJS One single way to filter, sort and paginate any list. Five parameters and a find() The example running through this a…
NestJS Error Capture: Tracking HTTP Exceptions Through Filter and Interceptor Boundaries
For a production logistics agent, error tracking should use one failure envelope at every execution boundary, then attach cost and latency before th…
The Repository Pattern in NestJS: a collection that happens to live in a database
The canonical starting point for a NestJS module backed by TypeORM is the one the framework itself documents: the module declares TypeOrmModule.forF…
Next.js + NestJS: Useful Architecture or Unnecessary Complexity?
Next.js and NestJS are often compared as if you have to choose one. But that comparison is slightly misleading. Next.js is primarily a React framewo…
Reliable Webhook Processing in NestJS: Signatures, Idempotency, Retries & Queues
Build reliable NestJS webhooks for SaaS payments and integrations using signature verification, idempotency, durable inboxes, queues, retries, and o…
I Created a NestJS Delivery Dispatch Backend with Concurrency Control & Dockerized Postgres
I built this delivery dispatch service to practice and master core backend engineering fundamentals in NestJS. Instead of just building a basic CRUD…
Building a tamper-evident audit log in NestJS with hash chains
Most audit logs are a lie by omission. You write a row that says "user X deleted document Y at 12:03." A week later, an incident review pulls it up,…
AWS Lambda and NestJS: Communication between services
Originally published on Medium on November 11, 2023. In this guide, we’ll speak about communication in a distributed system using AWS Lambda and Nes…
NestJS v12.0 vs. Ditsmod v3.0: Application Lifecycle and Graceful Shutdown (Part 5)
Welcome to Part 5—the grand finale of our "NestJS v12.0 vs. Ditsmod v3.0" series! Over the last four articles, we have unpacked the strict Dependenc…
NestJS v12.0 vs. Ditsmod v3.0: Dynamic Modules, Providers, and the Power of Extension Groups (Part 3)
Welcome to Part 3 of the "NestJS v12.0 vs. Ditsmod v3.0" series! In our previous articles, we explored the strict Dependency Injection hierarchies a…
NestJS v12.0 vs. Ditsmod v3.0: A Deep Dive into Node.js Framework Architectures (Part 1)
If you are building enterprise-grade Node.js applications with TypeScript, chances are you are already deeply familiar with NestJS . It has become t…
Structured Logging for Node.js
In Monitoring a SaaS in Production we wired up metrics and alerts so the team knows something is wrong within minutes of it happening. Metrics tell…
Audit Logs You Can Trust
In Structured Logging for Node.js , I covered how to turn scattered console.log calls into structured, queryable events. That solves the "what happe…
Scaling a SaaS Beyond One Server
In Deploying a Full Stack SaaS , I got the app running in production on a single instance: Docker images, a CI/CD pipeline, one NestJS container and…
Monitoring a SaaS in Production
In the last article , I set up a pipeline that builds, tests, and deploys the monorepo automatically. That solves getting code out safely and repeat…
Organizations, Teams, and Invitations
In Subscription Billing and Plans we wired up the part of the product that collects money. This article covers the part that gets people into the pr…