Swift (iOS/macOS) and Microservices: From Mobile App to Cloud Architecture

The book "Swift (iOS/macOS) and Microservices" is a practical guide for developers who want to go beyond the mobile platform and master building server systems in Swift. Unlike traditional courses, this book does not just introduce syntax, but teaches you to think architecturally: how to break a monolithic application into independent services, how to organize their interaction, and how to deploy a finished system in the cloud.

The book is intended for iOS and macOS developers with at least 1 year of experience, who already know the basics of Swift (types, protocols, async/await) and want to apply this knowledge on the server side. You will not need prior backend experience — all concepts are introduced sequentially, with reference to familiar patterns from Cocoa/UIKit.

What you will learn:

• Why Swift is an excellent choice for microservices: performance, type safety, shared code with the mobile application.
• How to set up a project on Vapor 4 — the most popular server-side Swift framework: routing, middleware, working with a database via Fluent.
• Asynchronous programming with SwiftNIO: channels, event loop, non-blocking I/O — without unnecessary theory, only practice.
• Microservices architecture: API Gateway, service bus, synchronous and asynchronous calls (HTTP/gRPC/WebSocket).
• Containerization and orchestration: Docker, docker-compose, simple deployment on Heroku and VPS.
• Testing distributed systems: integration tests, tests with real databases, mock services.
• A real project: from idea to a working microservice for an iOS application (chat with message history, user profiles, notifications).

Why is this book useful?

Most materials on Swift are limited to mobile development. This book fills the gap: you will learn to create full-fledged server applications without switching to Java, Python, or Go. You will be able to write the backend in the same language as the client — this reduces development time, simplifies debugging, and allows you to reuse data models.

The author is a practicing iOS developer with 7 years of experience, who has gone from single applications to distributed systems in a large fintech project. All examples are tested on real projects and are accompanied by links to a repository with ready-made code.

The book is suitable both for self-study and as a reference in commercial development. After reading it, you will be able not only to create microservices in Swift but also to confidently discuss architecture with backend colleagues in any language.