#nestjs

Upload Files to Amazon S3 Using Presigned URLs

How I Reduced Backend Load by Moving File Uploads Directly to Amazon S3

Why I Built an Onion Router in Node.js (and What it Taught Me About Traffic Analysis)

A deep dive into building NOVA: custom multi-hop onion routing, TLS 1.3 mTLS link layers, X25519/HKDF layered encryption, adaptive traffic…

From Idea to Production in Half the Time! Yes, That’s Next.js

There can be a lot of setup involved in turning an idea into a working product. In 2026, Next.js will expedite and simplify that process…

🚀 How I Built an Enterprise AI Chatbot Using NestJS, Azure AI Foundry & Cosmos DB

Introduction

Understanding NestJS Dependency Injection Through TypeScript’s Compile-Time vs.

If you’ve worked with NestJS and Mongoose, you’ve probably encountered a dependency injection error that seems confusing at first glance…

Clean Code Architecture in NestJS: What I Learned After a Year of Building With It

I started my backend career with plain Node.js and Express. About a year ago I moved to NestJS, and it changed how I structure backend…

Cron jobs and schedulers with BullMQ

In-process cron (node-cron, @nestjs/schedule, OS crontab) runs inside one Node process. That is fine for a single instance, but it does not…

From Spec to NestJS CQRS: Building Type-Safe Architectures

📚 This Article Series: Part 7 of a 10-week sequence on Advanced Architecture & AI Automation — bridging Spec-Driven Development with…

Deploying a NestJS Backend with Docker on AWS EC2

A Complete Step-by-Step Guide — From Zero to Production

Mastering Clean Architecture in NestJS: Ports, Adapters, Strategy & Factory Patterns

Build scalable NestJS applications using Hexagonal Architecture, Ports & Adapters, Strategy, and Factory patterns.

NestJS vs Express: Which One Should You Use?

If you’re building a Node.js backend, two names come up constantly: Express and NestJS. Express has been the default choice for over a…

A clean @Transactional() Decorator for NestJS + TypeORM Without passing EntityManager

Transaction management is easy to make ugly. A method needs a transaction, so you thread a queryRunner or an EntityManager through every…

Onboarding doesn’t have to be painful

We’ve all been there, you start a new job and on day 1 you want to get started. But first, you need to find all of the repos and install…

Modern Backend Architecture with NestJS: From Modular Monolith to Microservices.

Creating modern backend apps is more than just about the API and connecting it to a database. When applications increase both in size and…

Building a Full-Stack CRUD App with Nx Monorepo, Angular, NestJS, and GraphQL

Building a full-stack application often means managing multiple projects, separate dependencies, and duplicate configuration for the…

From Monolith to Microservices, Part 1: The Architecture I Started With

How spice-me evolves from a modular monolith into a microservice architecture — one deliberate step at a time.

NestJS Summed Up: The What, Why, and How

In this article, we’ll understand some of the most important NestJS concepts using simple language and practical examples instead of…

Node.js vs NestJS: The Truth About Which One You Should Learn First

Most Developers Are Asking the Wrong Question and It’s Costing Them Months

Using CQRS and Event Sourcing in NestJS: Build Scalable Event-Driven Applications — Djamware

As applications grow in complexity, traditional CRUD architectures often become difficult to maintain, scale, and audit. Business…

Building an IoC Container from Scratch: How NestJS and Spring Actually Work

You’ve written @Injectable() dozens of times. But if someone asked you what it actually does, could you explain it without saying "it…

Membuat Unit Testing sederhana dengan Jest pada NestJs

Implementasi unit testing pada NestJs dengan Jest

Fastify or NestJS: The Framework Decision That Didn’t Survive Its First Week

This is the second post in a series on building a multi-platform conferencing app. Part 1 covered the big-picture architecture — the…

Nx Monorepo: The Smart Way to Manage Angular & NestJS Projects

Ever Felt Like Managing Multiple Projects Is Becoming a Mess?

[NestJS / TypeScript] 執行 pnpm run build 後不會生成 dist 資料夾

NestJS Exception Filters: Handling Errors with Grace

If you’ve ever built a web API, you know that things don’t always go according to plan. Users might send invalid data, request resources…

Understanding Middleware in NestJS (NestJS Basic Series)

If you are building high-performance backend architectures, you already know that clean, manageable code is the key to scaling. Today, we…

Building a Production-Grade Distributed Job Platform — BullMQ, Redis, Prometheus, and Grafana

From a polling-based PostgreSQL queue to a real distributed system with observability, retries, and CI/CD

Jest에서 toBe() 대신 toBeCloseTo()를 사용해야 할 때

최근 프로젝트에서 좌표 계산 관련 util 함수에 대한 테스트 코드를 작성했습니다.

왜 테스트를 해야 할까?

그동안 테스트 코드 없이 구현 위주로 개발을 진행해왔고, 문제가 발생할 경우 디버깅을 통해 하나씩 수정하는 방식으로 작업해왔습니다. 하지만 하나의 함수에서도 다양한 예외 상황이 발생할 수 있으며, 이러한 상황을 매번 런타임에서 확인하는 방식에는…

Stop Coding Blindly: Empower Your AI Agent with Spec-Driven Development (SDD)

📚 This Article Series: Part 2 of a 10‑week sequence on Advanced Architecture & AI Automation — from Spec to Production-Ready Systems.

reduce를 사용하여 날짜별 데이터 그룹핑하기

Export API를 구현하다 보면 단순히 DB 데이터를 조회하는 것에서 끝나지 않고, 원하는 형태로 데이터를 구조화하는 작업이 자주 필요합니다.

Building a Multi-Channel Notification System in NestJS — Part 3: WhatsApp with Twilio

Series overview: Part 3 — WhatsApp with Twilio

WebSockets in NestJS (Part 2)

In Part 1, we covered how WebSockets work and how to implement basic communication using NestJS gateways. That foundation is enough for…

Building a Reusable Offset Pagination Layer in NestJS with TypeORM and GraphQL

One helper, one factory, and every list query in your app gets pagination for free.

Why “Cannot Read Properties of Undefined” Happens So Often in NestJS (And How I Finally Fixed It)

Kalau kamu sering main backend pakai NestJS, ada satu error yang hampir pasti pernah bikin hidup terasa tidak damai:

Building a Multi-Channel Notification System in NestJS — Part 2: Adding SMS with Twilio

Series overview: Part 2 — SMS with Twilio

Simple and stateless JWT authentication flow in NestJS

Step 1: Install Dependencies

Fedaco: Laravel Eloquent Rebuilt for TypeScript

If you’ve ever wished you could bring Eloquent’s elegance into your Node.js stack, Fedaco is your answer.

Empathetic AI with LangChain and NestJS

Feels like AI integration has become almost unavoidable in modern applications.

Building a Multi-Channel Notification System in NestJS — Part 1: Async Email Delivery with BullMQ &…

Series overview: In this three-part series we build a production-ready notification system that sends Email, SMS, and WhatsApp messages…

How Your Backend Talks to a Blockchain — The Four Flows Every Developer Should Know

You know APIs. You know databases. Now someone says “integrate with the blockchain.” Here’s the mental model that makes it click.

Multi-Tenancy in NestJS, TypeORM, and GraphQL: When Schema Isolation Isn’t Enough

A senior engineer’s guide to database-per-tenant architectures, with encrypted credentials, CLS-threaded connections, and zero cross-tenant…

My monorepo setup to ship full-stack, end-to-end type-safe apps with TypeScript

During the previous year, I took quite some time to find my perfect tech-stack that would allow me to ship TypeScript apps fast, with…

El kit de herramientas que falta para backends Nodejs/nestjs de producción

Problemas:

Why Your NestJS Guards Might Be Failing You: 4 Surprising Truths About Modern Backend Security

For many NestJS developers, @UseGuards() feels like the ultimate security layer.

하루 단위 데이터 매칭 자동화를 위한 NestJS Cron 적용기

하루에 한 번씩 데이터를 관리하고 정제하는 과정이 필요하여, 이를 자동으로 수행하기 위해 Cron을 사용해보았습니다.

WSO2 Choreo Tutorial

Deploying a Full-Stack NestJS + Next.js App in 2026

📚 Technical Documentation: @mehdijony/nestjs-user-service

🛠 Core Philosophy

API Versioning: The Line Between Junior and Senior Backend Engineering

A guide to mastering API evolution strategies and implementation in NestJS.

NestJS with Fastify vs. NestJS with Express: An Advanced Comparison

In the evolving landscape of Node.js backend development as of 2026, NestJS stands out as a robust, TypeScript-first framework for crafting…