Learn KOTLIN with Real Code Examples
Updated Nov 17, 2025
Architecture
Runs on JVM (bytecode)
Compiles to Kotlin/JS for web
Compiles to LLVM for native
Uses the Kotlin compiler (K2 incoming)
Rendering Model
Compiles to JVM bytecode
Compiles to JavaScript
Compiles to native (LLVM)
Unified model through Kotlin Multiplatform
Architectural Patterns
Coroutine-first backend design
MVVM / MVI in Android with Compose
KMP shared business logic
DSL-driven API design
Real World Architectures
Android + KMP shared modules
Ktor microservices
Compose desktop productivity apps
Full KMP cross-platform mobile apps
Design Principles
Conciseness
Safety (especially null-safety)
Interoperability with Java
Tooling-first productivity
Scalability Guide
Use flows and ViewModels
Split modules by feature
Use KMP for shared logic
Leverage coroutine dispatchers efficiently
Migration Guide
Migrate Java files gradually to Kotlin
Use IDE auto-conversion
Adopt coroutines step-by-step
Refactor into idiomatic Kotlin patterns