Kotlin

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June 23, 2025

Kotlin 2.2.0 Released

The Kotlin 2.2.0 release is out! This version includes both new and stable language features, tooling updates, performance improvements for different platforms, and important fixes. Here are some additional highlights from this release: For the complete list of changes, refer to What’s new in Kotlin 2.2.0 or the release notes on GitHub. Join the Kotlin […]

June 19, 2025

Ktor 3.2.0 Is Now Available

Ktor 3.2.0 is here! This is the second minor release of the year, bringing exciting new features, performance improvements, and bug fixes. This release includes two new modules for dependency injection and HTMX, support for Gradle version catalogs, automatic configuration deserialization, Unix domain socket support for CIO, and much more. Check out the full changelog […]

June 10, 2025

Kotlin for Server-Side Development: Community Content Roundup #2

The Kotlin community keeps delivering valuable content for server-side development. From gRPC best practices to hands-on Ktor tutorials and Spring integrations, here are the latest highlights. 📖 [Article] Kotlin Tips and Tricks You May Not Know: #6 — Inject Functions in Spring Boot – Elena van Engelen-Maslova shares how to inject functions in Spring Boot […]

June 2, 2025

AI-Powered Learning, Part 2: Get Unstuck With AI Hints in Python and Kotlin Tasks

In our previous post, we introduced AI-powered machine translation and inline theory definitions to help make learning smoother and more accessible. Today, we’re excited to share the next big step in bringing intelligent assistance to your programming journey: AI hints. This feature is designed especially for beginners who may get stuck while solving coding tasks […]

Kotlin blog

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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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.Server-side

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.Server-side

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.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

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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