Swift for Microservices: iOS, macOS, and Cloud Architecture

The book "Swift (iOS/macOS) and Microservices" is a practical guide for developers who want to go beyond classic mobile development and master building server infrastructure in Swift. Unlike most books limited to UIKit or SwiftUI, this material focuses on creating microservice architecture, where Swift serves not only as a language for client applications but also as a full-fledged tool for the backend.

The book starts with the basics: you will understand how microservices differ from a monolith, which communication patterns (REST, gRPC, message queues) are best suited for the Apple ecosystem. Then you will dive into server-side Swift with the Vapor framework: learn to route requests, work with databases (PostgreSQL, SQLite), create asynchronous APIs, and manage data streams. Special attention is given to integration with native iOS/macOS applications — you will learn how to reuse business logic between the server and client using shared Swift Package Manager packages.

Who this book is for:

• iOS developers looking to expand their skill set with server-side development
• macOS developers creating distributed desktop systems
• Backend engineers interested in Swift as an alternative to Java, Go, or Node.js
• Tech leads planning a migration from monolith to microservices in the Apple ecosystem

What you will learn:

• How to build a fault-tolerant microservice on Vapor 4+ with async support
• Implementing inter-service communication: REST, WebSocket, Message Queue
• Containerization and deployment of Swift microservices in Docker and Kubernetes
• Monitoring, logging, and tracing of distributed systems
• Creating an SDK for iOS/macOS that is automatically generated from server models
• Testing microservices: unit, integration, end-to-end
• Ensuring security: JWT, OAuth2, data encryption

The book contains real-world cases: from a simple REST service for notes to a full-fledged task management system with push notifications via APNs. All examples are available in the repository and tested on macOS 14+ and Ubuntu 22.04. This is not just theory — you will be able to immediately apply the knowledge in production projects.

Reading requires a solid knowledge of Swift (1+ year of experience) and a basic understanding of network protocols. Familiarity with other microservice frameworks is not required — all concepts are explained from scratch in the context of Swift.