Kotlin

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Why Kotlin?

fun main() {
    val name = "stranger"        // Declare your first variable
    println("Hi, $name!")        // ...and use it!
    print("Current count:")
    for (i in 0..10) {           // Loop over a range from 0 to 10
        print(" $i")
    }
}

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Latest news

August 14, 2026

Exploring Compose HTML for Server Side Rendering

Something is happening in server-rendered web development. React shipped Server Components. HTMX made “hypermedia” cool again. Phoenix LiveView proved a server can push interactive UI updates without a client framework in sight. Every ecosystem seems to be rediscovering the server as a place to render UI, except one: the JVM. What if Compose, the UI […]

August 12, 2026

When Escape Routes Become Toll Roads: Mapping How Developers Move Between Programming Languages

TL;DR: This post relates findings about language migration from the 2025 State of Developer Ecosystem survey. In general, project requirements are still the most common reasons for switching languages. One outlier from this trend, however, is Kotlin. People switch to Kotlin not because they have to; they switch because it simply feels better to work […]

August 4, 2026

Kodee’s Kotlin Roundup: Birthday Wishes, Shipaton 2026, and the New Kotlin AI Benchmark

Hi everyone! July gave me plenty to celebrate: Kotlin turned 15, got its first public benchmark for AI coding agents, became available in BlueJ, and shipped its 2.4.10 release. Developers can also demonstrate their skills at RevenueCat Shipaton 2026 by building a Kotlin Multiplatform app and competing for the Ship Kotlin Everywhere Award. Meanwhile, X […]

July 31, 2026

Know Kotlin? Ship It Everywhere and Win at Shipaton 2026

Somewhere in your notes there’s an app idea waiting for a free weekend that never comes. Consider this its official deadline: RevenueCat Shipaton 2026, the world’s biggest mobile hackathon, runs August 1 to September 30. If you know Kotlin, that idea is closer to the App Store than you think. Join the Shipaton The Ship […]

Kotlin blog

Kotlin in action

McDonald's leverages Kotlin Multiplatform (KMP) for their global mobile app, enabling them to build a codebase that can be shared across platforms, removing the need for codebase redundancies.Kotlin Multiplatform

AWS opted for Kotlin over Java for Amazon Quantum Ledger Database (QLDB) thanks to its expressiveness and structured concurrency. They rewrote QLDB in Kotlin, enhancing the user experience, benefiting from its development workflow, and adopting it fully for server-side development.Backend

Philips utilizes Kotlin Multiplatform in its HealthSuite digital platform mobile SDK. With KMP, they accelerated the implementation of new features and fostered increased collaboration between Android and iOS developers.Kotlin Multiplatform

Adobe Experience Platform chose Kotlin for server-side development because of its concise syntax, async capabilities, and interoperability with Java. This shift boosted productivity and improved the developer experience, replacing Java for real-time services.Backend

By sharing over 80% of logic across iOS and Android, Forbes now rolls out new features simultaneously on both platforms, keeping the flexibility to withhold or customize features based on the specific platform.Kotlin Multiplatform

Atlassian adopted Kotlin for the Jira Software cloud, leveraging its Java compatibility for seamless integration and minimizing migration challenges. Kotlin's ease of use improved developer productivity and boosted team satisfaction and efficiency.Backend

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Share code on your terms and for different platforms

Simplify the development of cross-platform projects with Kotlin Multiplatform. It reduces time spent writing and maintaining the same code for different platforms while retaining the flexibility and benefits of native programming. Kotlin applications will work on different operating systems, such as iOS, Android, macOS, Windows, Linux, watchOS, and others.

Learn about Kotlin Multiplatform

Kotlin + AI

JetBrains is investing in AI models tailored for Kotlin, providing open data, benchmarks, and AI-native tooling integrated into your workflow.

At the same time, Kotlin makes it easy to build your own AI-powered features with seamless backend integrations and a growing ecosystem.

What you get with Kotlin + AI

Strong support across JetBrains AI tools like AI Assistant and Junie
Robust functionality for building AI-powered apps on the JVM
Native integration with tools like Spring AI and LangChain4j
Open data and benchmarks for better code generation

Learn about JetBrains AI Build AI apps with Kotlin

Build your own AI agents with Koog

Koog is JetBrains’ new Kotlin-native framework for creating powerful AI agents that run locally, interact with tools, and automate complex tasks. Whether you’re developing a simple chat assistant or an advanced multi-step workflow, Koog gives you full control with clean Kotlin code – no external services are required. Build, extend, and experiment with AI agents entirely in Kotlin.

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Big, friendly and helpful community

Kotlin has great support and many contributors in its fast-growing global community. Enjoy the benefits of a rich ecosystem with a wide range of community libraries. Help is never far away — consult extensive community resources or ask the Kotlin team directly.

Kotlin Foundation

Actively supports community efforts in developing the Kotlin ecosystem.

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Start using Kotlin today!

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