Building APIs with TypeScript

If you’ve ever shipped an API only to be surprised by runtime errors, inconsistent contracts, or fragile integrations, this guide shows a better path. Harness strong typing, modern tooling, and proven patterns to deliver services that scale cleanly and remain maintainable release after release.

Create Scalable, Type-Safe, and Maintainable RESTful and GraphQL APIs Using TypeScript

Overview

Building APIs with TypeScript is your hands-on roadmap to Create Scalable, Type-Safe, and Maintainable RESTful and GraphQL APIs Using TypeScript, blending clear explanations with production-grade techniques for TypeScript API development. It covers REST API design and GraphQL implementation; Express.js with TypeScript and the Fastify framework; database integration with ORM patterns; rigorous input validation; secure authentication systems and authorization patterns; resilient error handling; API testing strategies; documentation generation; production deployment workflows; performance optimization; code quality practices; developer tooling; and practical type safety patterns, all delivered as an IT book, programming guide, and technical book you can keep on your desk.

Who This Book Is For

• JavaScript developers moving to TypeScript who want confidence in their API contracts. You’ll learn how to leverage typing to prevent bugs before they reach production.
• Backend engineers seeking a robust approach to REST and GraphQL. Expect battle-tested guidance on designing endpoints and schemas, integrating databases, and enforcing input validation.
• Tech leads and team builders aiming to standardize best practices. Use the patterns, checklists, and tooling tips to level up quality, speed up reviews, and mentor your team effectively.

Key Lessons and Takeaways

• Design with types first to eliminate whole classes of runtime errors. You’ll model domain entities, requests, and responses so IDEs and CI can police your API contracts automatically.
• Build REST endpoints and GraphQL schemas that scale with your product. The book details when to choose Express.js with TypeScript versus the Fastify framework, and how to keep route handlers and resolvers clean, modular, and testable.
• Validate inputs and secure your services end to end. From schema-based input validation to authentication systems and authorization patterns, you’ll enforce correctness and access control without duplicating logic.
• Integrate databases with confidence using modern ORM patterns. Learn how to type your models, services, and repositories for safe queries and predictable migrations as your schema evolves.
• Handle errors predictably to enhance observability and user experience. You’ll standardize error handling, map failures to meaningful HTTP statuses, and produce actionable logs and metrics.
• Test thoroughly, from unit to integration and contract tests. The guide demonstrates how to combine type checks with API testing to catch regressions early and document expected behavior.
• Automate documentation generation to reduce drift. Generate OpenAPI/Swagger or GraphQL SDL from source, keeping consumers aligned with the latest real contract.
• Ship with confidence using production deployment strategies. You’ll apply environment configuration patterns, health checks, and rollout processes that keep uptime high.
• Optimize performance without sacrificing readability. Learn profiling techniques, caching opportunities, and concurrency patterns that remain friendly to future maintainers.
• Adopt developer tooling that speeds delivery and improves code quality. From linting and formatting to commit hooks and CI pipelines, you’ll set up a frictionless workflow.

Why You’ll Love This Book

You get pragmatic, step-by-step guidance that starts simple and builds toward real production complexity. Every concept is paired with concrete examples, patterns, and trade-offs so you understand not just how to implement something, but why it works. The result is a practical companion you can consult during greenfield builds, refactors, and day-to-day maintenance.

How to Get the Most Out of It

1. Begin with the fundamentals on typing, project setup, and folder structure, then progress through REST and GraphQL chapters. By the time you reach advanced topics like deployment and performance, the patterns will feel second nature.
2. Apply each topic to a real service at work or a personal project. For instance, convert a single endpoint to typed input validation, introduce centralized error handling, and then add contract tests to lock in behavior.
3. Practice with mini-projects: build a Fastify-based microservice, design a GraphQL schema for a feature, or refactor ORM models to enhance type coverage. Document your contracts automatically and measure the impact on reliability.

Get Your Copy

If you want fewer production surprises, faster code reviews, and APIs that are a joy to extend, this book is a fast track to that outcome. Start implementing proven patterns today and let TypeScript do the heavy lifting for your team.

👉 Get your copy now