Latest news
August 29, 2025
ICPC World Finals Livestream: ecnerwala and SecondThread Speed-Solving Kotlin Challenge
Join us live from the ICPC World Finals in Baku, Azerbaijan, for a special event. This year, we are hosting a head-to-head match where two of the world’s top competitive programmers, Andrew ‘ecnerwala’ He and David ‘SecondThread’ Harmeyer, will speed-solve Kotlin problems in real time. Save the date: September 2, 2025, at 9:30 am UTC […]
August 28, 2025
Koog 0.4.0 Is Out: Observable, Predictable, and Deployable Anywhere You Build
Featuring Langfuse and W&B Weave Support, Ktor Integration, Native Structured Output, iOS Target, GPT-5, and More. Koog 0.3.0 was about making agents smarter and persistent. Koog 0.4.0 is about making them observable, seamlessly deployable in your stack, and more predictable in their outputs – all while introducing support for new models and platforms. Read on […]
August 27, 2025
Exploring Data Science With Kotlin: A Powerlifting Case Study
This is a guest post from Adele Carpenter. Adele is a Software Engineer and Consultant at Trifork Amsterdam, where she works on educational systems in the Kotlin/Java/Spring ecosystem and advises customers on their projects. TL;DR This blog post uses a dataset from the sport of powerlifting to get you up and running with Kotlin Notebooks, […]
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 […]
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")
}
}Kotlin in action
Share code on your terms and for different platforms
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.
Get startedBig, friendly and helpful community
Kotlin Foundation
