API Development in TypeScript: From Zero to Production

The book "API Development in TypeScript" is a comprehensive practical guide for anyone who wants to master creating modern, reliable, and scalable APIs in TypeScript. Whether you are just starting your journey in backend development or already have experience with JavaScript, this book will help elevate your skills to a new level.

What is this book about?

This is not just a syntax reference. You will go through the full API creation cycle — from architecture design to production deployment. The book covers both classic REST and modern approaches with GraphQL. You will learn how to use TypeScript's strict typing to build APIs that are easy to maintain and extend.

What will you learn?

• TypeScript basics for the backend: types, interfaces, generics, decorators, working with asynchrony.
• API design: REST principles, versioning, pagination, filtering, error handling.
• Popular frameworks: Express, Fastify, NestJS — comparison, selection, practical examples.
• Working with databases: PostgreSQL, Prisma, TypeORM, Mongoose. Migrations, transactions, query optimization.
• Authentication and authorization: JWT, OAuth2, sessions, role-based access control.
• Testing: unit tests, integration tests, e2e tests with Jest and Supertest.
• API documentation: OpenAPI/Swagger, GraphQL Playground, generating documentation from code.
• Optimization and security: caching, rate limiting, attack protection, data validation.
• Deployment and monitoring: Docker, CI/CD, logging, metrics, scaling.

Who is this book for?

• Junior developers — master API creation from scratch and understand best practices.
• Middle developers — systematize your knowledge, learn advanced techniques and patterns.
• Senior developers — find ready-made solutions for complex tasks and architecture recommendations.
• Fullstack developers — learn to build a reliable backend for your frontend applications.

Why should you read this book?

TypeScript is rapidly becoming the standard for serious Node.js projects. This book doesn't just teach you to write code — it teaches you to think architecturally, anticipate problems, and build APIs that can withstand load and be easily evolved. Each chapter contains practical examples ready for use in real projects. You will gain not only theoretical knowledge but also battle-tested patterns and approaches.

The book is written in a lively, clear language, with complex concepts explained through simple examples. All code examples are available in the repository, so you can immediately apply them in practice.

Make your API reliable, secure, and performant with TypeScript!