Node.js Mastery: Complete Course

From Zero to Production-Ready Applications

A comprehensive 35-part course covering Node.js from absolute fundamentals to advanced production patterns. Designed for developers who want to deeply understand how Node.js works under the hood and build scalable, maintainable applications.

Course Structure

Part 1: Foundations (Modules 1-5)

Module	Topic	Key Concepts
1	What is Node.js	V8 engine, event loop basics, non-blocking I/O, Node vs browser
2	Node.js Architecture Deep Dive	libuv, thread pool, event loop phases, microtasks vs macrotasks
3	Modules and Package Management	CommonJS, ES Modules, npm, package.json, semantic versioning
4	Core Modules Essentials	fs, path, os, util, events, buffer, stream basics
5	Asynchronous Programming	Callbacks, Promises, async/await, error handling patterns

Part 2: Core Concepts (Modules 6-10)

Module	Topic	Key Concepts
6	The Event Loop Internals	Phases, timers, I/O callbacks, setImmediate vs setTimeout
7	Streams and Buffers	Readable, Writable, Transform, Duplex, backpressure
8	Events and EventEmitter	Custom events, error events, memory leaks, patterns
9	File System Operations	Sync vs async, watching files, permissions, atomic writes
10	Child Processes and Workers	spawn, exec, fork, Worker Threads, clustering

Part 3: Networking and HTTP (Modules 11-15)

Module	Topic	Key Concepts
11	TCP and UDP with Net Module	Sockets, servers, connection handling, keep-alive
12	HTTP Module Deep Dive	Request/response cycle, headers, status codes, streaming
13	Building REST APIs from Scratch	Routing, middleware pattern, content negotiation
14	Express.js Fundamentals	Middleware, routing, error handling, best practices
15	Advanced Express Patterns	Custom middleware, plugins, security, performance

Part 4: Data Layer (Modules 16-20)

Module	Topic	Key Concepts
16	Database Fundamentals	Connection pooling, transactions, query builders
17	PostgreSQL with Node.js	pg driver, parameterized queries, migrations
18	MongoDB with Node.js	Native driver, Mongoose, aggregation, indexing
19	Redis with Node.js	Caching, pub/sub, sessions, rate limiting
20	ORM Patterns	Prisma, Sequelize, TypeORM, choosing the right tool

Part 5: Authentication and Security (Modules 21-24)

Module	Topic	Key Concepts
21	Authentication Strategies	Sessions, JWT, OAuth 2.0, passport.js
22	Security Best Practices	OWASP top 10, input validation, SQL injection, XSS
23	Cryptography in Node.js	Hashing, encryption, signing, secure random
24	Rate Limiting and Protection	DDoS protection, brute force, API abuse prevention

Part 6: Testing and Quality (Modules 25-27)

Module	Topic	Key Concepts
25	Unit Testing with Jest	Mocking, assertions, coverage, test patterns
26	Integration and E2E Testing	Supertest, database testing, test containers
27	Code Quality Tools	ESLint, Prettier, TypeScript, documentation

Part 7: Performance and Scaling (Modules 28-31)

Module	Topic	Key Concepts
28	Performance Profiling	CPU profiling, memory leaks, flame graphs
29	Caching Strategies	In-memory, Redis, HTTP caching, cache invalidation
30	Horizontal Scaling	Clustering, load balancing, sticky sessions
31	Message Queues	Bull, RabbitMQ, async job processing

Part 8: Production Excellence (Modules 32-35)

Module	Topic	Key Concepts
32	Logging and Monitoring	Winston, Pino, structured logging, APM
33	Error Handling Patterns	Centralized handling, graceful shutdown, circuit breakers
34	Deployment and DevOps	Docker, CI/CD, environment management, PM2
35	Building Production Applications	Complete project, architecture decisions, best practices

What Makes This Course Different

This course teaches Node.js the way experienced engineers understand it:

Internals First: Understanding how Node.js works under the hood makes everything else click
No Magic: Every abstraction is explained before being used
Production Focus: Real-world patterns, not toy examples
Performance Aware: Every decision considers performance implications
Security Conscious: Security is integrated, not an afterthought

Prerequisites

JavaScript fundamentals (variables, functions, objects, arrays)
Basic understanding of HTTP and REST
Command line familiarity
No prior Node.js experience required

How to Use This Course

Follow the order: Each module builds on previous concepts
Type the code: Don't just read, implement every example
Experiment: Modify examples to understand edge cases
Build projects: Apply concepts to your own projects between modules
Revisit internals: Come back to early modules as you gain experience

Environment Setup

Before starting, ensure you have:

bash
# Install Node.js (LTS version recommended)
# Download from https://nodejs.org or use nvm

# Verify installation
node --version    # Should show v18.x or higher
npm --version     # Should show 9.x or higher

# Recommended: Install nvm for version management
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh | bash
nvm install --lts
nvm use --lts

The Journey Ahead

Node.js powers some of the world's most demanding applications: Netflix, LinkedIn, PayPal, Uber, and countless others chose Node.js for its performance, developer productivity, and ecosystem.

By the end of this course, you will understand not just how to use Node.js, but why it works the way it does. This deep understanding separates engineers who can debug any problem from those who struggle when things go wrong.

Let's begin.

Start with Module 1: What is Node.js