Node.js Design Patterns
by Mario Casciaro & Luciano Mammino
Master advanced Node.js patterns and techniques for building scalable, maintainable applications. This guide covers everything a senior Node.js developer needs to know—from the event loop internals to microservices architecture.
Last updated: 2026-02-05
Chapters
This guide covers the following chapters. Work through them in order for the best learning experience.
The Node.js Platform
Understanding Node.js architecture, event loop, and the reactor pattern
The Module System
CommonJS, ES Modules, module patterns, and dependency management
Callbacks and Events
The callback pattern, EventEmitter, and event-driven architecture
Asynchronous Control Flow
Promises, async/await, and managing complex async operations
Streams and Buffers
Readable, writable, transform streams, and backpressure handling
Creational Design Patterns
Factory, Builder, Singleton, and Dependency Injection patterns
Structural Design Patterns
Proxy, Decorator, Adapter, and Middleware patterns
Behavioral Design Patterns
Strategy, State, Iterator, and Observer patterns
Universal JavaScript
Code sharing between browser and server, module bundling
Scaling and Architectural Patterns
Clustering, load balancing, and microservices architecture
Messaging and Integration Patterns
Message queues, pub/sub, and request/reply patterns
Advanced Recipes
Error handling, testing, security, and production best practices