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Kotlin by JetBrains
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Kotlin is a programming language that makes coding concise, cross-platform, and fun — https://kotlinlang.org/

Video tutorials http://kotl.in/video
News http://kotl.in/news
Community discussions http://kotl.in/slack
🖼️ Animation tuning as an art form? At KotlinConf25, @nicole-terc.bsky.social showed us how to master AnimationSpec for custom animations.

Catch the full session here:
https://youtu.be/clDGqPfaIto?si=Fud8Tagdk8ZE2bPM
November 11, 2025 at 2:16 PM
We’re getting closer to Exposed 1.0.0! 🎯

In RC-3, we focused on polishing and fixing bugs in previously delivered features (like R2DBC support and cleaner imports), and on updating and streamlining transaction management.

Give it a try and share your feedback before the release!
kotl.in/vow8yv
Release 1.0.0-rc-3 · JetBrains/Exposed
Change log New Contributors @nicktelford made their first contribution in #2616 @IlyaPechuro made their first contribution in #2641
kotl.in
November 11, 2025 at 12:39 PM
📣 The KotlinConf’26 Call for Papers closes soon – you’ve got just three weeks left to submit your idea! We’d love to hear your Kotlin story. sessionize.com/kotlinconf-2...
November 11, 2025 at 8:13 AM
Are you for Kotlin 🏝️ or Python 🐍 ?

Team Kotlin → tap like 💜
Team Python → hit repost 🔁

Everyone → read how Python compares to Kotlin and why more teams are switching their backends to Kotlin in this article by @marcinmoskala.bsky.social kotl.in/z44li1
From Python to Kotlin: A Transition Worth Making | The Kotlin Blog
Discover why more teams are moving their backend projects to Kotlin for better safety, and scalability in this article by Marcin Moskała.
kotl.in
November 10, 2025 at 7:28 PM
📦 Library publication is much easier in Kotlin 2.2.20!

New Gradle tasks help generate key pairs, upload public keys, and verify everything locally before publishing to Maven Central.

👉 Learn more: https://kotl.in/libpb
November 10, 2025 at 4:50 PM
Hey Android devs! Planning your next career move for 2026? Go beyond a single platform.
We’ve launched #KMPLevelUp — a free 4-week journey to master KMP with curated courses, expert content, and a live webinar. Time to ship your Kotlin skills to iOS & web: jb.gg/vbl7v4
Level Up with Kotlin Multiplatform | JetBrains Learning Journey
Master Kotlin Multiplatform before 2026! Join JetBrains’ 4-week KMP learning journey with expert courses, talks, and career insights.
jb.gg
November 10, 2025 at 10:46 AM
We’ve recently released Compose Multiplatform 1.10.0-beta01! 🎉

Highlights of this EAP feature release include:
🧩 Unified @Preview annotation
🧭 Support for Navigation 3
🔥 Bundled Compose Hot Reload

What’s new: https://kotl.in/qb7gxf 👈
GitHub: https://kotl.in/kevvbf 👈
What's new in Compose Multiplatform 1.10.0-beta01 | Kotlin Multiplatform
kotl.in
November 8, 2025 at 11:55 AM
⚙️ Concurrent programming in Kotlin just got safer!

The @jetbrains.com Research team developed LitmusKt, a new testing tool for Kotlin’s multiplatform concurrency, and it’s now part of Kotlin’s CI pipeline.

🔗 Learn more: https://kotl.in/eqo4vz
Finding Order in the Mayhem: A Novel Concurrency Testing Tool that Improved the Kotlin Compiler | The Research Blog
At JetBrains Research we built LitmusKt — a novel concurrency testing tool for Kotlin’s unique mix of JVM, Native, and JavaScript backends.
blog.jetbrains.com
November 7, 2025 at 12:45 PM
🎉 Ktor 3.3.2 is here! Explore the changelog to learn more.
kotl.in/nf86gx
WhatsNew 3.3
Kotlin Server and Client Framework for microservices, HTTP APIs, and RESTful services
kotl.in
November 7, 2025 at 10:21 AM
📣 Calling all Ktor users! We’d love your input! Take our annual survey and share your thoughts, challenges, and ideas to help us make the framework even better.

Your feedback shapes the future of Ktor 🚀

Take the survey 👉 surveys.jetbrains.com/s3/05ddc3ebe...
November 6, 2025 at 9:15 AM
🏦 Trust in Kotlin across the financial technology sector is growing.

Yuri Geronimus (Verifone) explains why Kotlin is becoming a strategic choice for payment systems and enterprise-scale solutions.

Learn more👇
yurigeronimus.medium.com/kotlin-in-pa...
Kotlin in Payment Gateways and Fintech — A Strategic Fit for 2026 Architectures
Kotlin isn’t just a developer preference — it’s becoming a business strategy. For fintech, it means safer money flows, faster audits, and…
yurigeronimus.medium.com
November 3, 2025 at 4:16 PM
🚀 Kotlin Multiplatform devs, this is the news you've been waiting for!

The KMP plugin for Android Studio Otter | 2025.2.1 is now available on Linux and Windows.

👉 Install now: kotl.in/kmp-plugin
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
October 31, 2025 at 2:06 PM
Think you might have missed breaking Kotlin news? No worries! Kodee has gathered all the top stories in the latest Kotlin Roundup. 💜

👉 https://kotl.in/roundup-oct25 👈
Kodee’s Kotlin Roundup: Finally Back with News | The Kotlin Blog
After a short break, Kodee’s here to share the latest Kotlin highlights, releases, and stories from September and October.
kotl.in
October 30, 2025 at 1:45 PM
We’re running our yearly Kotlin Multiplatform survey to understand how the ecosystem is growing, how our recent releases are performing, and where to focus our efforts next.

Your experiences matter!

Take a few minutes to share your feedback 👉 https://surveys.jetbrains.com/s3/KMP-Survey-2025-B
October 28, 2025 at 1:45 PM
💜 Don’t miss what’s next in Kotlin.
Get bite-sized updates, inspiration, and sneak peeks delivered right to your inbox.

Subscribe and stay in the loop 👉 https://kotl.in/news

📰 The new edition is coming soon!
October 25, 2025 at 11:50 AM
💳 Processing 43B+ transactions a year, Worldline needed a language that could evolve with their growth.

Kotlin’s concise syntax, type safety, and Java interoperability help their backend engineers deliver at scale.

🎥 Watch the testimonial from Worldline’s lead developer.
youtu.be/3IxDICQTutw?...
How Kotlin Server-Side Development Delivers Real Business Results for Worldline
YouTube video by Kotlin by JetBrains
youtu.be
October 21, 2025 at 3:27 PM
A conversation around Kotlin coroutines 💜

@sebi.io, @zsmb.co, and @marcinmoskala.bsky.social spent two glorious hours exploring coroutines in depth.

🎙️ If you love Kotlin, you won't want to miss this episode: www.youtube.com/watch?v=1zY4...
Discussing Kotlin Coroutines with Marcin Moskała | Talking Kotlin 141
YouTube video by Kotlin by JetBrains
www.youtube.com
October 21, 2025 at 4:44 AM
🚀 Dokka 2.1.0 is out!

This version focuses on stabilizing experimental features, supporting new Kotlin language updates, and improving the user experience.

🔗 Check out the details: https://github.com/Kotlin/dokka/releases/tag/v2.1.0

We'd really appreciate your feedback!
October 17, 2025 at 2:07 PM
💡 If you're thinking about submitting a session for KotlinConf 2026, check out our blog post with insider tips to help your proposal shine ✨

👉 kotl.in/conf26-propo...
🎤 Ready to share your Kotlin story on the big stage? The KotlinConf’26 Call for Papers is open!

Learn how to craft a standout proposal with guidance from veteran presenters, JetBrains speakers, and KotlinConf committee members. Read more ⤵️
https://kotl.in/conf26-proposal-tips
Crafting Your KotlinConf Proposal: Expert Tips to  Help You Stand Out | The Kotlin Blog
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, ...
blog.jetbrains.com
October 12, 2025 at 12:31 PM
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
October 10, 2025 at 4:09 PM
🎉 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 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
October 10, 2025 at 2:07 PM
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
October 10, 2025 at 12:30 PM
⚡ 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
October 7, 2025 at 2:06 PM
📱 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
September 27, 2025 at 8:52 AM
🚀 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
September 26, 2025 at 1:53 PM