Ultimate Kotlin Multiplatform for App Development

Unify your Android, iOS, and Web Projects with One Powerful Language — Kotlin Multiplatform.

Key Features

● Master cross-platform development with Kotlin for Android, iOS, and Web apps from a single shared codebase.
● Get hands-on with modern libraries and tools like Ktor for networking, dependency injection, SQLDelight for database handling, and Jetpack Compose for UI.
● Enhance productivity with real-world best practices, CI/CD pipelines, testing strategies, and performance optimization.

Book Description

Kotlin is a modern, expressive, and versatile language that has transformed the way developers build applications. Ultimate Kotlin Multiplatform for App Development takes you on a complete journey to mastering Kotlin Multiplatform, empowering you to create high-performance Android, iOS, and Web applications from a single shared codebase.

You will begin by exploring the core foundations of Kotlin, syntax, structure, and key features, before advancing into topics such as object-oriented and functional programming, coroutines, and concurrency. From there, the book guides you through multiplatform architecture, project setup, Gradle configuration, and dependency management, giving you the skills to structure efficient, scalable cross-platform projects.

Practical examples show you how to leverage essential libraries such as Ktor for networking, Koin for dependency injection, SQLDelight for database management, and Multiplatform Settings for shared configurations. Thus, by the end of this book, you will have the confidence and expertise to build, deploy, and optimize cross-platform applications — and become a truly modern Kotlin Multiplatform developer!

What you will learn

● Build cross-platform apps for Android, iOS, and Web using a single shared Kotlin codebase.
● Configure and manage multiplatform projects efficiently with Gradle and IDE tools.
● Master Kotlin essentials and advanced concepts, including coroutines, serialization, and functional programming.
● Integrate modern libraries such as Ktor, Koin, and SQLDelight for networking, DI, and data persistence.
● Create native-like UIs with Jetpack Compose, SwiftUI, and Kotlin/React.
● Apply clean architecture and best practices for scalable and maintainable app design.

Who is this book for?

This book is tailored for mobile, web, and software developers who want to build high-quality, cross-platform applications with a single shared codebase. Prior experience in Android, iOS, or web development is an advantage—but not a necessity. Hence, whether you are a Kotlin beginner or an experienced developer looking to modernize your workflow, this book will help you master Kotlin Multiplatform, and create apps that run seamlessly everywhere.

1. Introduction to Kotlin
2. Basics of Kotlin Programming
3. Advanced Kotlin Programming
4. Understanding Kotlin Multiplatform
5. Building a Multiplatform Project
6. Utilizing Multiplatform Libraries and Tools
7. Android Development with Kotlin Multiplatform
8. iOS Development with Kotlin Multiplatform
9. Web Development with Kotlin Multiplatform
10. Testing and Debugging Multiplatform Code
11. Continuous Integration and Deployment
12. Performance Optimization
13. Best Practices for Multiplatform Development
14. Case Studies and Future Trends
Index

Gowtham Shanmugaraj Ganesan is a versatile full-stack developer with over 14 years of experience building secure, scalable, and high-performance applications across backend and mobile platforms. With a strong foundation in Java and Spring Boot, he has delivered robust server-side systems supported by RESTful APIs, OAuth 2.0–based security, Hibernate/JPA, asynchronous messaging, and performance-optimized architectures.

Complementing his backend expertise, Gowtham is a seasoned Android engineer skilled in Kotlin, Java, Jetpack Compose, and Kotlin Multiplatform (KMP). His work with KMP focuses on creating shared codebases across Android, iOS, Web, and Desktop, enabling teams to ship consistent, modular, and maintainable applications.

About the Technical Reviewer

Imran Solanki has over 13 years of experience in building robust and scalable software solutions across multiple domains, including telecommunications, health tech, IoT, logistics, and finance. His journey began with low-level systems programming, where he worked on Windows driver development and ported FLAC encoding to wireless speaker systems. Since then, he has transitioned through diverse roles—mobile application developer, back-end engineer, and technical consultant-always with a strong focus on impact, performance, and quality.

Imran has contributed to projects for leading global organizations such as Avaya and Cisco, developed video surveillance and WebRTC applications, and helped modernize platforms for digital pharmacies and investment firms. He has architected and developed backend systems using Java, Kotlin, Ruby on Rails, and .NET Core, and is fluent in cloud infrastructure and DevOps tooling. Kotlin has been a consistent part of his toolkit—from the early days of Android development to building payment gateway systems and exploring Kotlin Multiplatform to share code across web, mobile, and backend platforms.