Kotlin is a modern, statically typed programming language developed by JetBrains that runs on the Java Virtual Machine (JVM) and can also compile to JavaScript or native code. Since Google announced it as the preferred language for Android development in 2019, Kotlin has experienced rapid adoption across mobile, server-side, and multiplatform projects.
The language was designed to address many of the pain points associated with Java while maintaining full interoperability with existing Java codebases. Key features include null safety built into the type system, concise syntax that reduces boilerplate code, coroutines for asynchronous programming, extension functions, and smart casts. These capabilities enable developers to write safer, more expressive code with fewer lines.
Beyond Android, Kotlin is widely used for backend development with frameworks like Ktor and Spring Boot, and its multiplatform capabilities allow teams to share business logic across iOS, Android, web, and desktop applications from a single codebase. Backed by strong tooling support in IntelliJ IDEA and Android Studio, Kotlin has established itself as a versatile and production-ready language for modern software engineering.