One Codebase, Every Platform

Building applications for multiple platforms often means maintaining multiple codebases.

The result is duplicated logic, inconsistent behavior, slower development cycles, and higher maintenance costs.

"Kotlin Multiplatform in Production" is a practical, engineering focused guide to building cross-platform applications with shared business logic using Kotlin Multiplatform.

This book teaches you how to maximize code reuse while preserving the native experience users expect on every platform.

Modern teams must support:

• iOS applications
• Android applications
• web experiences
• backend services

Maintaining separate implementations for every platform can quickly become expensive and difficult to scale.

Kotlin Multiplatform allows teams to:

• share core business logic
• reduce duplicated code
• improve consistency across products
• accelerate feature delivery
• maintain platform specific user experiences

This book shows how to achieve these benefits in real production environments.

• fundamentals of Kotlin Multiplatform architecture
• structuring shared and platform specific code
• sharing business logic across applications
• networking and API integration patterns
• local storage and data synchronization
• dependency injection strategies
• testing shared modules effectively
• performance optimization techniques
• deployment and release workflows
• scaling large cross-platform codebases

Throughout the book, you will learn how to:

• design maintainable shared modules
• reduce duplication across teams
• build reusable domain and data layers
• integrate platform specific capabilities cleanly
• improve development velocity
• maintain production quality across platforms

Each chapter focuses on practical software engineering workflows used in modern cross-platform teams.

• consumer mobile applications
• SaaS companion apps
• enterprise mobile platforms
• shared business logic libraries
• multi-platform product ecosystems
• cross-platform startup applications

These examples reflect real world software development challenges.

• Kotlin developers
• Android engineers
• iOS developers exploring shared architecture
• mobile engineering teams
• software architects
• organizations managing multiple platform applications

If you want to build applications that share code intelligently while maintaining native quality, this book provides the roadmap.

Share logic once.
Deliver everywhere.
Scale development without duplication.