Serverless computing allows you to build applications without managing infrastructure. This guide covers developing, deploying, and optimizing Node.js functions in serverless environments. 1. Serverless Fundamentals Key Characteristics Use Cases 2. AWS Lambda Basics Basic Function Structure Common Trigger Events 3. Development Tools Serverless Framework AWS SAM 4. Performance Optimization Cold Start Mitigation Connection Pooling 5. […]

Microservices architecture breaks applications into small, independent services. This guide covers designing, building, and operating Node.js microservices in production. 1. Microservices Fundamentals Key Principles When to Use Microservices 2. Service Decomposition Identifying Service Boundaries Domain-Driven Design Concepts 3. Communication Patterns Synchronous (HTTP/RPC) Asynchronous (Message Brokers) 4. Service Implementation Product Service Example 5. API Gateway Basic

Socket.io enables real-time, bidirectional communication between web clients and servers. This guide covers everything from basic setup to advanced patterns for production applications. 1. WebSocket Fundamentals How WebSockets Work Socket.io Features 2. Basic Setup Server Implementation Client Implementation 3. Core Communication Patterns Basic Messaging Acknowledgment 4. Rooms and Namespaces Room Implementation Namespaces 5. Advanced Patterns

Optimizing Node.js applications requires a systematic approach. This guide covers profiling, benchmarking, and optimization techniques to make your applications blazing fast. 1. Performance Metrics to Monitor Key Server Metrics Memory Metrics 2. Profiling Tools Built-in Node.js Profiler Chrome DevTools 3. CPU Optimization Event Loop Monitoring Worker Threads 4. Memory Optimization Heap Snapshots Memory Leak Detection

Taking your Node.js application from development to production requires careful planning. This guide covers all major deployment approaches with best practices for each. 1. Deployment Target Options Traditional Servers Platform as a Service Serverless 2. Preparing for Deployment Environment Configuration Production Dependencies 3. Process Management PM2 (Recommended) Systemd (Linux) 4. Deployment to Heroku Step-by-Step Process

Robust testing is essential for maintaining reliable Node.js applications. This guide covers unit, integration, and end-to-end testing with modern JavaScript testing tools. 1. Testing Pyramid Overview Unit Tests Integration Tests E2E Tests 2. Testing Setup with Jest Basic Configuration Basic Test Example 3. Testing Asynchronous Code Callbacks Promises 4. Mocking Dependencies Manual Mocks Jest Automatic

Proper error handling and debugging are essential skills for Node.js developers. This guide covers everything from basic error patterns to advanced debugging techniques. 1. Node.js Error Types Built-in Error Types Common Operational Errors 2. Basic Error Handling Patterns Try/Catch Blocks Error-First Callbacks Promise Error Handling 3. Advanced Error Handling Custom Error Classes Global Error Handler

Implementing secure authentication is crucial for any production Node.js application. This guide covers JWT, sessions, OAuth, and security best practices. 1. Authentication Strategies Session-Based Token-Based (JWT) OAuth/Third-Party 2. JWT Authentication Implementation Setup and Configuration User Registration 3. Login and Token Generation 4. Protecting Routes with Middleware Auth Middleware Role-Based Access 5. Session-Based Authentication Setup with

Databases are essential for persistent data storage in Node.js applications. This guide covers MongoDB (NoSQL) and PostgreSQL (SQL) integration with best practices for production applications. 1. Database Options in Node.js NoSQL Databases SQL Databases 2. MongoDB with Mongoose Setup and Connection Defining Schemas and Models 3. CRUD Operations with Mongoose Create Read Update Delete 4.

Middleware functions are the backbone of Express applications, handling everything from request processing to authentication. This guide will transform you into a middleware expert. 1. What is Middleware? Key Characteristics Basic Structure 2. Types of Middleware 1. Application-Level Middleware 2. Router-Level Middleware 3. Error-Handling Middleware 4. Built-In Middleware 5. Third-Party Middleware 3. Middleware Execution Flow