Kotlin

Build a Kotlin Multiplatform Project and Win a Trip to KotlinConf 2026

This year’s Kotlin Multiplatform Contest for students and recent graduates is open. Build a project using KMP, and it could take you to KotlinConf 2026 in Munich, Germany! Join the contest!

Crafting Your KotlinConf Proposal: Expert Tips to Help You Stand Out

Thinking about sharing your Kotlin expertise on the big stage? Check out some best practices for conference proposals and insider advice from JetBrains speakers, KotlinConf program committee members, and experienced presenters.

Amper Update, October 2025 – Compose Hot Reload and UX Improvements

Amper is an experimental, standalone build tool by JetBrains, for server-side and Kotlin Multiplatform development. Read on for the latest updates!

Koog ×ばつ A2A: Building Connected AI Agents in Kotlin

If you’ve ever tried building a system of multiple AI agents, you’ve probably run into the problem. It starts simple enough: you’ve got one agent writing blog posts, another proofreading them, and maybe a third suggesting or generating images. Individually, they’re effective. But getting them to work together? That's where things might start falling apart.

The Kotlin AI Stack: Build AI Agents With Koog, Code Smarter With Junie, and More

Explore SDKs, Spring AI, MCP, Koog, and Junie – see how Kotlin powers AI apps and enhances your workflow with integrated AI tools.

Ktor Roadmap and Previews

OpenAPI and WebRTC support have been available in preview since the Ktor 3.3.0 release. See what else is coming to Ktor!

Your Voice Belongs Here: Creating Compelling KotlinConf Proposals [Livestream]

Have you given a talk before – maybe at a meetup, online event, or a smaller conference – and wondered if you're ready for a bigger stage like KotlinConf? This supportive and practical webinar is designed for people from underrepresented groups in tech who already have some speaking experience an...

Kotlin 2.2.20 Released

The Kotlin 2.2.20 release is out! This version delivers important changes for web development and other improvements. Learn more!

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...

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 ...

Exploring Data Science With Kotlin: A Powerlifting Case Study

Explore data science using Kotlin: connect to PostgreSQL, analyze with DataFrame, and plot insights with Kandy in this powerlifting case study.

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.