Kotlin and Microservices: Building Distributed Systems on the JVM

Modern development increasingly requires building distributed, scalable, and fault-tolerant applications. The book "Kotlin and Microservices" is a comprehensive guide that will take you from the first steps in microservice architecture to deploying production solutions in Kotlin.

What is this book about?

The book begins with the fundamental principles of microservices: monolith decomposition, inter-service communication, and data management. Then you will dive into practice — learning to create microservices using two popular frameworks: Ktor (lightweight, asynchronous) and Spring Boot (proven enterprise approach). Special attention is given to Kotlin coroutines, which allow handling thousands of requests with minimal memory overhead.

What will you learn?

• API design: REST, GraphQL, and gRPC — when and what to choose
• Asynchronous programming with Kotlin Coroutines and Flow
• Working with databases: Exposed, Hibernate, reactive drivers
• Security: JWT, OAuth2, inter-service authentication
• Packaging with Docker and orchestration with Kubernetes
• Monitoring, logging, and tracing (Prometheus, Grafana, Jaeger)
• Testing microservices: unit, integration, contract

Who is this book for?

• Java/Kotlin developers who want to transition from monoliths to microservices
• Backend engineers familiar with the JVM but not experienced with distributed systems
• Software architects studying modern approaches to building services
• Students and course graduates seeking practical skills

Why should you read it?

The book is written in a lively style, containing numerous code listings, diagrams, and practical exercises. You won't just read theory — you will create a full-fledged project: an order management system with multiple microservices, message queues (RabbitMQ/Kafka), and a CI/CD pipeline. All examples are tested on current versions of Kotlin (1.9+) and are compatible with Java 17+.

From the author: "Microservices are not a silver bullet, but the right approach to designing them in Kotlin can change your career. I will show you how to avoid common mistakes and make your system flexible and maintainable."

This book will become your desktop reference when working with distributed systems. Whether you are building a startup or an enterprise solution, you will find proven patterns and ready-made solutions here.