TypeScript Application Architecture

The book "TypeScript Application Architecture" is a practical guide to building reliable, scalable, and easily maintainable projects in TypeScript. It is designed for developers who are already familiar with the basics of the language and want to reach the next level: learning to design architecture, not just write code.

Unlike most guides that focus on syntax or frameworks, this book is dedicated to principles and patterns that remain relevant regardless of the chosen stack. You will learn to think systematically, make architectural decisions, and avoid common mistakes.

What you will learn:

• Modular Architecture — how to break an application into loosely coupled modules that are easy to test and replace.
• SOLID and GRASP Principles — how to apply them in the context of TypeScript, not just memorize definitions.
• Design Patterns — from classic GoF to modern ones (CQRS, Event Sourcing, Repository) with TypeScript examples.
• Dependency Injection (DI) — how to organize an IoC container and manage dependencies without frameworks.
• Typing as an Architecture Tool — advanced types, conditional types, mapped types for creating safe APIs.
• Testability — how architecture affects writing unit, integration, and e2e tests.
• Migration from JavaScript — strategies for gradually introducing TypeScript into an existing project.

Who this book is for:

• Middle and Senior developers working with TypeScript, Angular, React, Node.js, or NestJS.
• Tech leads and architects who want to systematize their knowledge.
• Developers transitioning from JavaScript and facing scaling issues.

The book contains 12 chapters, over 50 real code examples, and practical exercises to reinforce the material. You won't just read theory — you will be able to immediately apply the knowledge in your projects. The examples cover both frontend (React, Angular) and backend (Express, NestJS), making the book universal.

The author is Anton Petrov, a lead developer with 10 years of experience and the author of several open-source TypeScript libraries. He shares not only technical techniques but also experience in making architectural decisions in real commercial projects.

If you want your application not to turn into a "Big Ball of Mud" but to remain flexible and understandable even years later — this book is for you.