Kotlin and Microservices: A Practical Guide

The book "Kotlin and Microservices" is a comprehensive practical guide for developers who want to master a modern approach to building distributed systems using the Kotlin language. Unlike classic textbooks, this material is focused specifically on microservice architecture and offers ready-made recipes for solving real-world problems.

What this book is about

You will start with the basics of Kotlin syntax and its key features (data classes, sealed classes, extension functions, coroutines), and then move on to designing microservice architecture. The author covers in detail:

• Creating REST APIs using the Ktor and Spring Boot frameworks
• Asynchronous programming and reactive streams (coroutines, Flow)
• Working with databases via Exposed and Spring Data
• Organizing inter-service communication (HTTP, gRPC, message queues)
• Error handling and monitoring (OpenTelemetry, Micrometer)
• Containerization with Docker and orchestration with Kubernetes
• Testing microservices (unit, integration, contract)

Who this book is for

The material will be useful for:

• Java developers who want to switch to a more concise and safe Kotlin
• Backend engineers planning to implement microservice architecture
• DevOps specialists wanting to gain a deeper understanding of building and deploying Kotlin applications
• Students and novice programmers familiar with the basics of the JVM

What you will learn

After reading the book, you will be able to:

• Design loosely coupled microservices with clear boundaries
• Use coroutines for efficient processing of thousands of requests
• Configure automatic scaling and load balancing
• Implement Saga, Circuit Breaker, and Event Sourcing patterns
• Ensure high fault tolerance and observability of the system

The book contains many code examples ready for use in real projects. All examples are available for download in the GitHub repository. This is not just theory — you will gain practical skills that you can apply at work tomorrow.

Whether you are building a startup or working on a corporate system, "Kotlin and Microservices" will be your reliable guide in the world of modern distributed development.