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Kotlin for Backend

Spring support, Java interop, coroutines.

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Kotlin for Server

Spring support, Java interop, coroutines.

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Kotlin for Backend

A simple way to boost your coding joy.

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Kotlin for Server

A simple way to boost your coding joy.

Try Now
Kotlin for Backend

A simple way to boost your productivity.

Try Now
Kotlin for Server

A simple way to boost your productivity.

Try Now
kotlin

Latest news

How Kotlin Notebook Helps You Teach Programming

August 26, 2025

How Kotlin Notebook Helps You Teach Programming

Kotlin Notebook is a great tool for educators who want to teach programming in a more hands-on way. It lets you combine runnable code, Markdown textual explanations, and visualizations in one interactive environment. There’s no need to switch between multiple windows with slides, live demos, and IDEs during lectures. You can use a single notebook […]

What’s Next for Kotlin Multiplatform and Compose Multiplatform – August 2025 Update

August 25, 2025

What’s Next for Kotlin Multiplatform and Compose Multiplatform – August 2025 Update

This post outlines our priorities and the general direction for our Kotlin Multiplatform and Compose Multiplatform projects over the next six to twelve months. Our goals for Kotlin Multiplatform are closely aligned with those detailed in the Kotlin roadmap. Be sure to check it out for more context around the direction we’re heading. Key priorities […]

Kotlin on the Backend – What’s New From KotlinConf 2025

August 22, 2025

Kotlin on the Backend – What’s New From KotlinConf 2025

KotlinConf 2025 has firmly placed server-side Kotlin in the spotlight, and rightly so. Between Spring collaboration, an upgraded ecosystem, performance boosts, AI tooling, and the adoption of the language by big companies, this is Kotlin at its (backend) best. Here’s a breakdown of what was announced, what’s new, and what you absolutely must check out […]

Kodee’s Kotlin Roundup: 2.2.20-Beta2, Kotlin LSP Update, Shipaton 2025, and a New Face on the Foundation Board

August 13, 2025

Kodee’s Kotlin Roundup: 2.2.20-Beta2, Kotlin LSP Update, Shipaton 2025, and a New Face on the Foundation Board

Kodee here – your ever-cheerful tour guide through the ever-bustling streets of Kotlin-land. Summer may be the season for vacations, but we’re not slowing down! Let’s take a stroll through the latest news. Did you know I regularly share Kotlin Roundups packed with the latest ecosystem news? Sign up to stay in the loop on […]

Kotlin blog
Why Kotlin?
Code examples
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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Kotlin in action

McDonald's
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
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.Server-side
Philips
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
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.Server-side
Forbes
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
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.Server-side

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

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.

Start using Kotlin today!