Kirill Rakhman

Companion Blocks & Extensions are ready for testing in Kotlin 2.5.0-Beta1. I've spent a good chunk of the last months working on this feature, so I'm very excited for the experimental release. blog.jetbrains.com/kotlin/2026/...

My "Context parameters and API design" talk at @kotlinconf.com is now available www.youtube.com/watch?v=O1nT...

I made a macOS screensaver inspired by JetBrains CAI's Noise Terrain animation. 🎉 It started as a web-based animation from Computational Arts Initiative team, translated cleanly into Kotlin Compose, then became a real screensaver using @zsmb.co's ScreenSaver project. 🔥 Download: jb.gg/screensaver

Kotlin 2.4.0 ships with a HUGE power-assert update I've been slowly working on for *years*. It's the culmination of efforts I started before joining JetBrains. It's subtle from the user's perspective, but it helped fixed a bunch of problems and unblocks tons of future improvements! 🚀

📢 Kotlin 2.4.0 is out! Learn more: ➡️ kotl.in/2-4-0

Ever upgraded Kotlin? We’d love your feedback! Tell us about your experience with Kotlin releases, including EAPs, stable versions, and patches! ⏱️ It takes just 12 minutes. Share your thoughts with us here: https://surveys.jetbrains.com/s3/Kotlin-release-1

Happy to share that we have folks from the language design team blogging about new features! Check out this post by @serranofp.com about how Kotlin is moving to a safer, Name-Based Destructuring syntax: blog.jetbrains.com/kotlin/2026/...

Awesome #Kotlin Compose Multiplatform app by my colleague for relaxing sounds. The fact that it's multiplatform means you can preview it directly in the browser 🤯. terrakok.github.io/CozySpace/

I used @gitbutler.com over the last couple days and I see a lot of potential. But I don't enjoy the permanent window switching so I decided to make a small @intellijidea.com plugin for it. plugins.jetbrains.com/plugin/31299...

Many developers care deeply about IDE performance, so we turned an internal post by Konstantin Nisht into a public one. It covers the architecture behind UI freezes in IntelliJ-based IDEs, what it took to move more work off the UI thread, and the results so far. blog.jetbrains.com/platform/202...

I created a free plugin for JetBrains IDEs — get it now! Got to IntelliJ IDEA 👉 ⚙️ Settings 👉 Plugin 👉 Search for "Sticky Project View" Comment if you like it! ❤️ youtube.com/shorts/L81XK...

Nice! My talk at @amsterdam.voxxeddays.com is already out! www.youtube.com/watch?v=bgCl...

The Kotlin roadmap was just updated! Check out what you can expect the team to work on in the near future. kotlinlang.org/docs/...

When you hear JPA, you think #Java. But what about #Kotlin? This code looks correct, but a DB-generated ID changes after save() and entities disappear from HashSet/Map. Val and non-null types give false guarantees due to the reflection. How to avoid it 👇 jb.gg/3cn6mp

Pebble going fully open source is a big win for hardware preservation. ⌚️🔓 But for mobile devs, the real story is in the repo. The new app is a pure KMP + Compose Multiplatform rewrite. 230k lines (Legacy Java/ObjC) ➡️ 37k lines (Kotlin) Shipped in 6 months with just 2 devs 🔥

All my fellow @kotlinlang.org server devs, there is still time to fill the annual Ktor survey! If you're using Ktor then please consider filling the survey, and help us continue making it better.

#Kotlin Context Parameters are super powerful and versatile @vadim-briliantov.bsky.social explains in this blog how to ensure correct usages of APIs by using context parameters to turn out of scope function calls into a compilation error. blog.kotlin-academy.com/stop-bugs-be...

Submitted talks about context parameters and name-based destructuring to @kotlinconf.com. Wish me luck 😁.

Well done to Slack for breaking the app in new in exciting ways. This time, clicking on Windows notifications doesn't open the app anymore. Of course this is on top of the *years* old bug that clicking on a notification unmaximizes the windows on a secondary monitor.

How do you configure @renovatebot.com to not automerge AGP updates? This doesn't seem to work. #android #dev

Bye bye, context receivers 👋 github.com/JetBrains/ko...

Kotlin 2.2.21 and 2.2.20 have a lot goodies in them. In my video, I'm looking at the highlights! www.youtube.com/watch?v=QWpp...

For WebStorm 2026.1 we want to hear what matters to you. Vote for issues or feature requests and we will do our very best to get those into the 2026.1 release!

I've written a small blog post about how context parameters change API design in Kotlin serranofp.com/blog/context... Feedback and discussion is more than welcome!

Context parameters are almost here, let's try migrating a real codebase to them and see what happens! If you've heard of them but haven't had the time to dive yet, follow me to discover what they can and can't do right now, ahead of their final stabilization. ivan.canet.dev/blog/2025/10...

We released Compose Hot Reload 1.0.0-rc01 🎆 What started as a happy accident was promised to be pushed towards stability as quickly as possible, allowing you to rely on a stable user experience. github.com/JetBrains/co...

Published a KEEP on suspend lambdas and anonymous functions: github.com/Kotlin/KEEP/...

Reminder that Compose Multiplatform (www.jetbrains.com/compose-mult...) is Stable on iOS, Android and Desktop....and now in Beta for Web.

Feel the difference with one tool for many SQL and NoSQL databases. Start a free 30-day trial or get DataGrip for free forever for non-commercial purposes: jb.gg/DGncsBS

The big premiere for SQL and database lovers: DataGrip is now free for non-commercial use! Start a free 30-day trial or get DataGrip for free forever for non-commercial purposes: jb.gg/DGncfBS

WTH is YouTube doing with this auto dubbing?

Some Kotlin highlighting bug in @compiler-explorer.com sent me down a rabbit whole of formal grammars, lexers and contributing to tools I use daily. flofriday.dev/posts/50-sha...

Blogged - Kotlin: Emerging Patterns with Context Parameters rakhman.info/blog/kotlin-... #programming #dev @kotlinlang.org

It's so cool to see the unrelenting progress of Kotlin and Compose Multiplatform....all the moving pieces steadily coming together!

SEO but for AIs should be called LLMO (pronounced "Elmo").

Took me long enough to realize that @gradle.com's api() dependency should be used when you expose a dependency's types in your own public signatures.

New Kotlin video! Context-sensitive resolution is one of those features that will kind of quietly blend into the background while making a lot of code much nicer. And you can already try it in Kotlin 2.2 as an experimental feature! Check out the details: www.youtube.com/watc...

Is there some universal law that any UI element related to AI needs to have a gradient and sparkles?

I think I found a really nice improvement for the NONE_APPLICABLE diagnostic in @kotlinlang.org today. In addition to listing all the candidates, we'll soon also print the reason why it wasn't applicable. #dev #kotlin #compiler

The « Building a RESTful Web Service » #Spring guide is now available in #Kotlin in addition to Java. We are collaborating with JetBrains to add Kotlin code snippets to the 10 most popular guides. spring.io/guides/gs/re...

🚀 Get ready for a smoother workflow and even greater productivity with IntelliJ IDEA! Starting with 2025.3, we are moving to a unified distribution to deliver a seamless, powerful development experience right at your fingertips. Check out our blog post 👇 blog.jetbrains.com/idea/2025/07...

Remember the marble diagrams used to explain RxJava? My brilliant colleague Kostya 🧙‍♂️ has made an interactive explainer for Kotlin Flows to match! Find the magic here: terrakok.github.io/FlowMarbles/

New KEEP on name-based and new positional-based destructuring for @kotlinlang.org has just dropped! github.com/Kotlin/KEEP/...

🔥 In his KotlinConf’25 talk, “Implementing Compose Hot Reload”, @sellmair.dev explains how to use Compose Hot Reload today – and how JetBrains tech made it all possible. ✨ Plus: challenges, lessons, and a few surprises. 📹 Watch on YouTube: kotl.in/conf-compose...

Here's our best talk on Compose Hot Reload yet, straight from its author, @sellmair.dev! Learn about how the technology was created, how it solved problems along the way, and how it can help you during UI development: www.youtube.com/watc...

First public beta of Compose Hot Reload github.com/JetBrains/co...