Building NestJS Controllers and Services for REST APIs

Modern backend development requires structured, scalable architecture to keep applications maintainable as they grow. NestJS solves this by enforcing a modular design that separates how you receive web requests from how you process data. This text-based course guides you through the fundamental architectural patterns of NestJS, focusing on how controllers handle incoming requests and how services manage your core business logic. You will start by learning key backend concepts, dependency injection principles, and NestJS terminology before diving into code. By the end of this course, you will be able to confidently build organized, testable, and secure RESTful endpoints. What you'll learn: - Understand the core architecture of NestJS, including modules, controllers, and providers - Create robust controllers to handle HTTP requests, route parameters, and query strings - Build reusable services to encapsulate business logic and manage data operations - Apply dependency injection to cleanly connect your controllers and services - Implement basic request validation using built-in pipes and modern validation decorators - Structure secure, maintainable RESTful API endpoints following industry best practices This course begins with foundational concepts and step-by-step written explanations, gradually moving toward building a complete, cohesive API structure. It is designed specifically for beginners who want to move beyond basic Node.js scripts and learn structured framework architecture. No prior experience with NestJS is required, though a basic understanding of JavaScript or TypeScript is helpful. Start reading today to elevate your backend development skills.