Concurrent Node.js: Building Responsive Backends for Single Page Apps, Microservices, and Real-Time Workloads

Modern backend systems are expected to be fast, fault-tolerant, and capable of handling thousands of concurrent users without breaking a sweat. Traditional models often fall short when faced with highly dynamic, real-time workloads. That's where Node.js shines-and this book shows you exactly how to harness its full potential to build scalable, production-grade backends. Concurrent Node.js is your practical, in-depth guide to mastering the asynchronous and concurrent capabilities of Node.js. Designed for developers who want to move beyond simple REST APIs, this book walks you through the full architecture, implementation, and deployment of backends that can handle everything from high-throughput APIs to live chat applications and distributed microservices. You'll learn how the event loop really works, how to structure non-blocking asynchronous code using modern JavaScript patterns, and how to avoid common concurrency pitfalls. From there, you'll design services that scale horizontally with Kubernetes, respond in real time with WebSockets, and coordinate safely in distributed environments using queues and event-based architectures. Through real-world code examples, you'll implement efficient patterns for managing race conditions, timeouts, and retries. You'll track system performance using Prometheus and APM tools, and ensure that your services remain responsive and observable even under heavy traffic. Whether you're building SPAs that demand low-latency APIs, microservices that interact asynchronously, or real-time systems like multiplayer games or collaborative tools, Concurrent Node.js gives you the tools and confidence to do it right. What you'll learn: How Node.js handles concurrency, and how to leverage the event loop efficiently Structuring scalable APIs with async/await, Promises, and worker threads Designing fault-tolerant microservices using queues, brokers, and patterns like sagas Real-time communication using WebSockets and broadcasting patterns Deploying, autoscaling, and gracefully updating services with Docker and Kubernetes Observing backend health with structured logging, metrics, and APM Avoiding common pitfalls like memory leaks, unhandled rejections, and blocking operations Build backends that don't just run-they respond, recover, and scale. If you're serious about building concurrent systems in Node.js that power real-world applications, this is the one book you need on your desk. Start building resilient, concurrent Node.js backends today-get your copy now.