Márton Braun

Kotlin 2.4.20 is out! It includes... * New allEqual / allDistinct functions * Coroutine stack trace recovery * Swift Export with sealed classes and cross-lang inheritance * New Wasm compilation modes * ...and more! Learn all about it in our latest video: www.youtube.com/watch?v=UhRf...

Had a surprisingly quick and pleasant arrival at Heathrow, on my way to Android Dev Summit tomorrow! Shockingly, this might be the first ever Google developer event of this sort that I actually make it to.

It's that time of year again! Tell me what your biggest problems are with adopting Kotlin Multiplatform or building KMP apps in the replies. Is it something with Compose? Is it the build system? Something around iOS? I'm all ears.

When you've pressed Shift Shift

Rating a place on Google Maps... What do you mean "How scary"?! 👀👻

> Short catchy sentence. And another one with a period. 🤮

Want to see KotlinConf 2027 from the inside? Join the volunteer team for a backstage pass (well, a volunteer badge). Meet fellow Kotlin fans, catch great talks, and help bring the conference to life. The call for volunteers is open! Apply here: https://kotl.in/8b9tdz

What is one new app, website, or software tool from the last 3 years that you picked up and really enjoy using, or get a lot of value from? What do you like about it? Looking for consumer apps, so no, it can't be a coding agent 😄

The yearly Kotlin Developer Survey is still open! 📝 Use this chance to send your feedback directly to the Kotlin team - on language, multiplatform, tooling, and anything else. 👉 surveys.jetbrains.co... (Seriously, this is a great way to influence the team's priorities!)

We're looking for amazing talks to put into the KotlinConf 2027 agenda, with submissions open until Nov 27! You can find more info, plenty of inspiration, and everything else you need to submit a talk on the Speakers page:

Guess who won, @zsmb.co vs. @sebi.io.

Good morning Berlin! Hope to meet lots and lots of people at next app dev con today 👋 You'll find me at my talk at noon, at a roundtable in the afternoon, and generally at the JetBrains booth!

We have some really cool improvements coming up for companions in Kotlin 2.5. Get a sneak peak from Alejandro's blog post now:

Missed the latest Kotlin 2.4.20 release so far? Catch up in video form! 👇

🔥 The Kotlin community is already planning the next reunion! 📍 Kraków, Poland 📅 April 21-23 KotlinConf 2027 Super Early Bird tickets are now on sale – it’s the lowest price for the biggest Kotlin event of the year. 🎟️ Get yours today! kotl.in/conf27-seb-x

The 2026 Kotlin Developer Survey is live! Use this chance to send feedback directly to the team, on everything Kotlin-related 👇

This is a really, really great conversation with Jake, covering everything from the history of Kotlin to how he's dealing with the current trends around AI, and what he's working on these days.

Today marks 3 years of working at JetBrains on Kotlin for me! 🎉 Please enjoy this photo of my first workday, which took place in a hotel in Seoul. #ThrowbackThursday

Kotlin Toolchain 0.12 was just released! It includes... 📚 KMP library publication (!) 🌐 Wasm app support 🖼️ Compose Preview support + more Android tooling 🔥 Better Compose Hot Reload 🍎 iOS improvements ... and much more! Learn about the rest here:

Wait... LinkedIn *doesn't* want to be full of AI slop? 🤯 News to me.

Is it just me or does everyone take notes with titles like macOS Mac setup terminal commands cli init settings bash zsh brew ... for "SEO" purposes?

Trying to understand peoples workflows these days: What percentage of... * code do you write by hand? * time do you spend in an IDE? * time do you spend instructing an agent or reviewing its work?

Compose Multiplatform 1.12 is out! kotlinlang.org/docs/... * Improved performance on iOS * Automatic font fallback on the web (e.g. for emojis!) * MCP server for Compose Hot Reload * General goodies from Jetpack Compose 1.12, like new Grid or gradient APIs * ... and more!

We'll be live in 15 minutes on RevenueCat's channel, talking about how you can build with KMP and CMP for the 2026 edition of the Shipaton! Tune in here:

📰 Kotlin roadmap update! Get your roadmap updates here 🗞️ kotlinlang.org/docs/...

Tomorrow, @revenuecat.com's Matt will be hosting @zsmb.co and myself where we will do a short presentation on the KMP category of the big Shipaton competition, followed by a Q&A. Have questions? We have answers! Join us on Tuesday, 25th of August at 6 pm CET here: www.youtube.com/watch?v=VAsl...

Here's a great video from Dave, with an overview of some exciting still-experimental Kotlin language features:

Deeply, deeply disappointed that Count Binface didn't win.

Shout-out to whoever put this on the reddit website. It's great at making me get off of reddit when I accidentally go there. That's not even a joke, I genuinely appreciate this being built in.

Have you caught up with everything that's new in Kotlin 2.4 yet? Collection literals, new standard library functions, multiplatform improvements, and more! All detailed in the video 👇

Gradle convention plugins are such a catch-22. They're theoretically the proper way of organizing configuration to reuse it across modules. But they're different and more complicated than normal config, so I really don't want to see them in samples for beginners...

Here's your friendly Friday reminder to subscribe to the Kotlin YouTube channel! We're dropping fantastic new KotlinConf talk recordings every day. www.youtube.com/kotl...

The two hardest problems in Computer Science are 1. Human communication 2. Getting people in tech to believe that human communication is important

If you had $500 of tokens to burn until the end of the work week... What would you use them on?

🐘 Top 5 Gradle tasks for Kotlin Multiplatform 🐘 1. wasmJsBrowserDevelopmentRun 2. linkReleaseFrameworkIosArm64 3. kotlinUpgradeYarnLock 4. compileKotlinJvm 4. embedAndSignAppleFrameworkForXcode 5. firstNotNullOfOrNull

A quick reminder for the 3-year anniversary of this blog post: "KMM" is deprecated. As in, we no longer use "KMM" to talk about Kotlin Multiplatform for the mobile use case. It's all just called KMP now!

It is hard to believe it has been 5 years since Compose 1.0.0! Amazing to have been a tiny part of this journey. https://android-developers.googleblog.com/2026/07/five-years-of-jetpack-compose.html

If you had $500 of tokens to burn until the end of the work week... What would you use them on?

POV: you tried opening Facebook but you're too quick on the keyboard

Some cool new features just dropped on https://klibs.io/ai You can now connect your agents with Klibsio using either MCP or a dedicated skill. Check out the page for more info!

Good news for all you AGP fans out there... IntelilJ IDEA 2026.2 Beta includes support for Android Gradle Plugin 9.1.0! Grab it from Toolbox today.

Having a 1 TB SSD means I can only try developing projects in one ecosystem at a time. There simply isn't enough storage to pull the dependencies for mobile things *and* Docker images for something backend-related at the same time...

Good morning to a new splash screen in @intellijidea.com 🎉 Happy cake day, @kotlinlang.org 🍰

If you have a "copy link" feature and you don't inject garbage into it... Thank you ❤️

Turns out that learning to create THING slowly, manually over time lets you gain experience with THING, and you can develop a fundamental understanding of what actually makes THING good. If the cost of creating THING drops to ~0, these skills and *taste* are what really matter.