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July 17, 2025
Ktor 3.2.2 Is Now Available
The Ktor 3.2.2 patch release brings a critical fix for Android D8 compatibility, along with some minor enhancements and bug fixes. 🚀 Get started Ready to explore Ktor 3.2.2? Start building your next project today with our interactive project generator at start.ktor.io. Your feedback and contributions are always welcome! 🔗 Get Started With Ktor | […]
July 17, 2025
Breaking to Build: Fuzzing the Kotlin Compiler
At JetBrains, we care about Kotlin compiler quality. One powerful way to test it? Fuzzing, an approach that feeds programs unexpected, often random, inputs to uncover bugs that traditional tests may miss. It may sound chaotic, but it works, especially for complex software like compilers. In a previous post, our colleagues introduced kotlinx.fuzz, a powerful […]
July 16, 2025
Building Better Agents: What’s New in Koog 0.3.0
We’ve just released Koog 0.3.0, which comes with many updates that make building, running, and managing intelligent agents easier. This version focuses on durability, speed, observability, and smoother integration with real-world systems. If you’ve been exploring how to develop your own intelligent agent that can handle complex workflows, the new and updated Koog could be […]
July 10, 2025
Modular Ktor: Building Backends for Scale
Ktor offers a lightweight, flexible approach to building web applications that differs from more opinionated all-in-one frameworks. While Ktor’s minimalist design might seem challenging at first, a little experience using our modules can go a long way towards building for scale. In this article, I’ll show you some techniques for introducing modularity to your Ktor […]
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
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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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Kotlin Foundation
