Márton Braun
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zsmb.co
Márton Braun
@zsmb.co
Developer Advocate @ JetBrains, working on Kotlin and Compose Multiplatform, KMP tooling, and Amper.

Instructor @ BME-VIK. Co-organizer @ Android Budapest. GDE for Android. Ex-Google.

zsmb.co
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So, today I found out about a secret, unsafe, internal property that makes Hot Reload waaaay faster. Like lightning fast. Even in a real project, not just with Hello World.

We're currently discussing if y'all are ready for this yet - we'll probably add it to guidance later.
December 24th, 9 pm, Eastern Standard Time.

From here on in...
December 25, 2025 at 2:00 AM
Sometimes it might be a good idea to just #BuildInPrivate
December 21, 2025 at 3:04 PM
Reposted by Márton Braun
✨ Introducing the Golden Kodee Community Awards ✨

We’re celebrating the people who make the Kotlin community shine – educators, creators, organizers, and innovators.

Think you deserve an award?

🏆 Nominate yourself now! → kotl.in/golden-kodee...
Golden Kodee Community Awards | 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.
kotl.in
December 19, 2025 at 10:51 AM
Reposted by Márton Braun
Kotlin 2.3.0 is out! My faves (no order) 😅

- Unused value checker
- Improved Context Sensitive Resolution
- Java 25 Bytecode
- JS suspend function export
- Better Swift Interop
- Explicit backing fields
- New Kotlin Uuid APIs

and there is much more! Check it out: blog.jetbrains.com/kotlin/2025/...
Kotlin 2.3.0 Released | The Kotlin Blog
The Kotlin 2.3.0 release is out! This version includes new language features, stable ones, and other features now enabled by default. This release also brings tooling updates, performance improvements
blog.jetbrains.com
December 17, 2025 at 9:57 AM
Finally! Been really waiting for this. Absolutely psyched.
December 17, 2025 at 10:37 AM
Reposted by Márton Braun
Last bit: Metro now has a quick start doc! h/t @zsmb.co for the suggestion and review

zacsweers.github.io/metro/latest...
Quick Start - Metro
A multiplatform dependency injection framework for Kotlin
zacsweers.github.io
December 15, 2025 at 10:20 PM
If your company name is now Whatever (formerly Something Else) maybe it wasn't necessary to rebrand
December 14, 2025 at 4:18 PM
The AMA is now on, and we're chewing through all the incoming questions! Still plenty of time to post your own.
Okay, here we go: the Kotlin Team AMA thread is now open, fire away with all your questions!

We'll be officially answering them 3pm-7pm CET.

www.reddit.com/r/Kot...
December 11, 2025 at 2:40 PM
Okay, here we go: the Kotlin Team AMA thread is now open, fire away with all your questions!

We'll be officially answering them 3pm-7pm CET.

www.reddit.com/r/Kot...
December 11, 2025 at 8:13 AM
So, today I found out about a secret, unsafe, internal property that makes Hot Reload waaaay faster. Like lightning fast. Even in a real project, not just with Hello World.

We're currently discussing if y'all are ready for this yet - we'll probably add it to guidance later.
December 8, 2025 at 4:05 PM
Shoutout to whoever at Google Docs decided that the URL parameter for comment discussions should be `disco`. It's great.
December 8, 2025 at 9:08 AM
This is happening in 1 week now!
We're doing an AMA on /r/Kotlin on December 11th! Prepare your questions, mark your calendars, and join us there in 2 weeks!

www.reddit.com/r/Kotlin/
December 4, 2025 at 9:50 PM
I'm always surprised by how many people don't know about the Kotlin Slack community. It's a fantastic place to discuss issues with others, with dedicated channels for almost any Kotlin topic, and lots of JetBrains people monitoring them too.
December 4, 2025 at 4:04 PM
A great write-up from Perk about how they adopted Compose Multiplatform! Cool to see this from an app that I actually use regularly.
Compose Multiplatform at Perk: A Pragmatic Look at Our Journey So Far
Reducing duplication and bringing our teams closer together
builders.travelperk.com
December 3, 2025 at 10:02 AM
Reposted by Márton Braun
Catch @zsmb.co and me hosting some true LEGENDS of the Android now KMP world. You can still RSVP and join to hear from:

- Jake Wharton
- Philipp Lackner
- Zac Sweers
- Russell Wolf
- Marco Gomeiro
- Chris Krueger
Hot take: "In 5 years, the role 'Android Developer' won't exist. We will all be 'Mobile Engineers'." 📉📈

True or just hype?

We’re debating this live with @zacsweers.dev, @zsmb.co, and mobile development experts.

Secure your seat: jb.gg/vbl7v4.
December 3, 2025 at 7:46 AM
This part of GitHub SSO makes absolutely no sense.
December 2, 2025 at 5:30 PM
We'll wrap up the KMP Level Up campaign with a webinar this Wednesday, with some fantastic guests from the community!

Sign up for it here: info.jetbrains.com/k...
December 2, 2025 at 3:24 PM
Kotlin is doing Advent of Code again! 🎄🎅 As it's now a shorter run of Advent of Code, you'll get 5 days of Kotlin live streams solving and discussing problems.

I wonder who the first guest will be... Find out later today on the link below!

www.youtube.com/watc...
December 1, 2025 at 12:20 PM
Reposted by Márton Braun
Today’s the last day to submit a talk for @kotlinconf.com. Go submit one!

Teaching something is a great way to deepen your understanding of it.
November 30, 2025 at 12:39 PM
KotlinConf 2026 tickets are 20% off for Black Friday! This is your best chance to grab them at a discount.
Registration | 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
November 28, 2025 at 1:35 PM
Reposted by Márton Braun
If you’ve ever wanted direct access to JetBrains experts… congratulations! December is your month. We’re hosting a multi-language AMA series on Reddit.

Stay tuned to join the conversation! 👇

➡️r/jetbrains: https://www.reddit.com/r/Jetbrains/

➡️r/kotlin: https://www.reddit.com/r/kotlin/
November 28, 2025 at 10:49 AM
We're doing an AMA on /r/Kotlin on December 11th! Prepare your questions, mark your calendars, and join us there in 2 weeks!

www.reddit.com/r/Kotlin/
November 27, 2025 at 4:08 PM
This is really giving "By Azura!"
November 27, 2025 at 9:42 AM
The most frequent question about Amper is definitely the extensibility story. You can find the answer now in the blog about the 0.9.0 release!
Amper Update, November 2025 – Extensibility Preview | The Amper Blog
Amper is an experimental, standalone build tool by JetBrains, for server-side and Kotlin Multiplatform development. Read on for the latest updates!
blog.jetbrains.com
November 26, 2025 at 3:24 PM