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Kotlin by JetBrains @kotlinlang.org · 1d

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!
👉 https://kotlinconf.com/contest/

Contest | KotlinConf 2026, May 20–22, Munich

KotlinConf is the official Kotlin conference by JetBrains. It is a place for the community to gather and discuss all things Kotlin.

kotlinconf.com

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Kotlin by JetBrains @kotlinlang.org · 1d

🎉 JUnit 6.0 is here, and it brings even deeper Kotlin support! Now, you get:

✨ Suspend and cancellation support
✨ Kotlin 2.2 baseline
✨ Improved nullability annotations
✨ Convenient UX with contracts

Check out the full release notes 👉 kotl.in/b8wncm?utm_c...

JUnit Team 💙💛 @junit.org · 12d

#JUnit 6.0.0 is released!

✨ Java 17 and Kotlin 2.2 baseline
🌄 JSpecify nullability annotations
🛫 Integrated JFR support
🚟 Kotlin suspend function support
🛑 Support for cancelling test execution
⏭️ New `--fail-fast` mode for ConsoleLauncher
🧹 Removal of deprecated APIs

docs.junit.org/6.0.0/releas...

JUnit Release Notes

docs.junit.org

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Kotlin by JetBrains @kotlinlang.org · 1d

Ktor 3.3.1 is here! Check out the changelog for the full details.
ktor.io/changelog/3....

WhatsNew 3.3

Kotlin Server and Client Framework for microservices, HTTP APIs, and RESTful services

ktor.io

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Kotlin by JetBrains @kotlinlang.org · 4d

⚡ Want to increase the speed of your iOS builds? Try incremental compilation for Kotlin/Native, by adding this to your Gradle properties:

kotlin.incremental.native=true

This is an experimental feature, and we'd love to hear your feedback.

Learn more 👉 https://kotl.in/t37r88

Tips for improving compilation time | Kotlin

kotlinlang.org

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Kotlin by JetBrains @kotlinlang.org · 15d

📱 Two Years with Kotlin Multiplatform: From Zero to 55% Shared Code

At KotlinConf’25, @rsicarelli.bsky.social shared how StoneCo – serving 4M+ users – scaled KMP adoption, trained 130 engineers, and achieved 55% code sharing across two large-scale mobile apps.

📺 kotl.in/u5aa8v

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Kotlin by JetBrains @kotlinlang.org · 15d

🚀 Build your first AI agent in Kotlin with Koog, JetBrains’ framework for LLMs!

Watch this short, step-by-step video and learn how to set up dependencies, create an LLM client, send prompts, handle responses, translate text, and call tools

👉 https://youtu.be/TAtU7joTGaA?si=sALwTYkr6fU3WOtA

Your First AI Agent in Kotlin | Tutorial

YouTube video by Kotlin by JetBrains

youtu.be

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Kotlin by JetBrains @kotlinlang.org · 16d

Do you have a complex business rule-set problem? Business rules spread across platforms, systems, and apps?

At KotlinConf’25, Anshika Koul shared how Norway’s 377-year-old national postal service tackled this challenge with Kotlin Multiplatform.

📺 kotl.in/v528cc

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Kotlin by JetBrains @kotlinlang.org · 18d

The Ktor roadmap for 2025–26 is here! Here's what we'll be working on:

🔶 API docs (OpenAPI is already in preview)
🔶 WebRTC Client with a Multiplatform API
🔶 Integration with Koog, the @jetbrains.com framework for building AI agents

Explore what’s next 👇 blog.jetbrains.com/kotlin/2025/...

The Ktor roadmap and previews | The Kotlin Blog

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

blog.jetbrains.com

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Kotlin by JetBrains @kotlinlang.org · 18d

🚀 The Kotlin Multiplatform plugin for IntelliJ IDEA is now on Linux and Windows!

Build for Android, desktop, and web – with all the latest web improvements included.

👉 Install now: https://kotl.in/kmp-plugin

P.S. Android Studio is coming soon, so stay tuned!

Kotlin Multiplatform - IntelliJ IDEs Plugin | Marketplace

This plugin for IntelliJ IDEA and Android Studio enables you to develop Kotlin Multiplatform applications targeting Android, iOS, desktop, web, and server. Write...

kotl.in

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Kotlin by JetBrains @kotlinlang.org · 19d

🚀 Compose Multiplatform for web goes Beta in the 1.9.0 release!

Now is the perfect time to bring your Compose code and skills to the browser with minimal effort. Extend your apps beyond mobile and desktop to the web.

Learn more ➡️ https://kotl.in/cmp190-blue

Compose Multiplatform 1.9.0 Released: Compose Multiplatform for Web Goes Beta | The Kotlin Blog

Compose Multiplatform for web is ready for real-world use by early adopters.

kotl.in

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Kotlin by JetBrains @kotlinlang.org · 22d

KotlinConf 2026 is heading to Munich!

🗓️ May 20 – Workshops | May 21–22 – Conference

🎟️ Regular admission tickets are now available! 👉 kotl.in/ghdlhc

KotlinConf @kotlinconf.com · 22d

✨ There’s nothing like experiencing #KotlinConf live – learning from experts, meeting the community, and being part of the biggest Kotlin event of the year.

📍 Munich, May 20–22, 2026
🎟 Tickets are available now! 👉 kotl.in/ghdlhc

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Kotlin by JetBrains @kotlinlang.org · 23d

🎉 Check out what's new on our Kotlin YouTube channel!

We’ve created a dedicated Kotlin Multiplatform playlist 📻 From quick tips and tutorials to KotlinConf KMP sessions, it’s your one-stop resource to learn and grow with KMP.

👉 Watch here: https://kotl.in/kmp-yt-play

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Kotlin by JetBrains @kotlinlang.org · 23d

📢 Kotlin DataFrame 1.0.0-Beta3 is out!

This update brings Parquet and DuckDB support, better compile-time schema tracking via the Compiler Plugin, and a big refresh of docs and examples.

Read the full release notes 👇 kotl.in/w2eq2c?utm_c...

Release v1.0.0-Beta3 · Kotlin/dataframe

We're one step closer to DataFrame 1.0! We've been working hard to iron out bugs and improve documentation and examples throughout. Try out this release by updating to 1.0.0-Beta3 in your project o...

kotl.in

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Kotlin by JetBrains @kotlinlang.org · 25d

Thinking about submitting a KotlinConf talk? ✨

@pamelaahill.bsky.social and @cheuk.dev are hosting a livestream to help you turn your idea into a compelling KotlinConf proposal.

Save the date: kotl.in/live-oc25
Your voice belongs here.

KotlinConf @kotlinconf.com · 25d

“Your Voice Belongs Here: Creating Compelling KotlinConf Proposals” 🎤

This livestream is for speakers from underrepresented groups in tech ready to level up! @pamelaahill.bsky.social and @cheuk.dev will share how to turn your Kotlin story into a strong proposal.

➡️ https://kotl.in/live-oc25

Live Webinar -

info.jetbrains.com

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Kotlin by JetBrains @kotlinlang.org · 26d

📣 KotlinConf'26 is calling for speakers!

Got a Kotlin story to tell? Submit your talk idea and be part of shaping this year’s event!

✍️ kotl.in/conf26-submi... ✍️

KotlinConf @kotlinconf.com · 27d

📣 The KotlinConf'26 Call for Speakers is OPEN!

Share your Kotlin expertise with the world – server-side, web, desktop, mobile, AI/ML, and more! Submit your proposal and get a chance to speak at the year's biggest Kotlin event!

👉 https://kotl.in/conf26-submittalk 👈

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Kotlin by JetBrains @kotlinlang.org · 27d

🎉 Ktor 3.3.0 has been released!

Check out the changelog for a full list of updates. ktor.io/changelog/3....

WhatsNew 3.3

Kotlin Server and Client Framework for microservices, HTTP APIs, and RESTful services

ktor.io

2 26

Kotlin by JetBrains @kotlinlang.org · 28d

Want to publish your Kotlin Multiplatform library to the Maven Central repository but not sure where to start? 🔎 We've created a step-by-step tutorial on how to do it!

Check it out: 👉 https://kotl.in/9jwqoc

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Kotlin by JetBrains @kotlinlang.org · Sep 12

🦸 Join Kotlin Heroes: Episode 13 today!

Sign up now for a chance to win a T-shirt and sharpen your Kotlin skills ⤵️
codeforces.com/contests/214...

1 6

Kotlin by JetBrains @kotlinlang.org · Sep 12

Thanks for noticing! You’re right, the mention didn’t turn into a link as expected. Sometimes the formatting doesn’t carry over perfectly. We’ll keep an eye on it for next time.

3

Kotlin by JetBrains @kotlinlang.org · Sep 11

📦 Multiplatform Settings: A case study in Multiplatform library development

In this KotlinConf’25 talk, @russhwolf.com shares the story of how the library began, its early evolution, and where it’s headed – inspiring others to create their own.

📺 Watch now: kotl.in/jru1t2

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Kotlin by JetBrains @kotlinlang.org · Sep 10

📢 The Kotlin 2.2.20 release is out, bringing important changes for web development! Kotlin/Wasm is now Beta, with improved exception handling in JavaScript interop, npm dependency management, built-in browser debugging support, and a new shared source set for js and wasmJs targets.

🔗 kotl.in/2.2.20

Kotlin 2.2.20 Released | The Kotlin Blog

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

kotl.in

9 33

Kotlin by JetBrains @kotlinlang.org · Sep 6

✨ “One Codebase, Three Platforms: X’s Experience with Kotlin Multiplatform” – watch this KotlinConf'25 talk on the Kotlin YouTube channel.

Arkadii Ivanov and Eric Denman share their exciting story about rewriting X for Android and how they leveraged KMP to do it.

📺 Watch now: kotl.in/entz2y

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Kotlin by JetBrains @kotlinlang.org · Sep 4

🚀 Check out this quick demo by @sellmair.dev‬ on using Skiko for high-performance image processing!

Skiko brings the power of the Skia graphics library to Kotlin with APIs and rendering context support.

🎥 Watch the full video: https://youtu.be/bsaqV83LqxI?si=vyDuPpS6ZGQRehsg

High-Performance Skiko Image Processing

YouTube video by Sebastian Sellmair

youtu.be

8

Kotlin by JetBrains @kotlinlang.org · Sep 3

⏳ The Kotlin Developer Survey closes soon – don’t miss your chance to provide us with feedback that will help guide Kotlin’s evolution.

Just 10 minutes to share insights we truly value.

👉 kotl.in/dev-survey-25

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Kotlin by JetBrains @kotlinlang.org · Sep 2

🛣️ 🗺️ See where Kotlin Multiplatform and Compose Multiplatform are headed next.

Explore the direction for the months ahead in our latest roadmap.

🔗 kotl.in/kmp-roadmap-25 🔗

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

Discover our priorities and the general direction for Kotlin Multiplatform and Compose Multiplatform over the next six to twelve months.

kotl.in

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