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
Instructor @ BME-VIK. Co-organizer @ Android Budapest. GDE for Android. Ex-Google.
zsmb.co
Pinned
Márton Braun
@zsmb.co
· Dec 8
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.
We're currently discussing if y'all are ready for this yet - we'll probably add it to guidance later.
It's absolutely astonishing how bad the quality of the YouTube app is. Just criminal. Someone needs to be removed from that team big time.
January 7, 2026 at 10:32 AM
It's absolutely astonishing how bad the quality of the YouTube app is. Just criminal. Someone needs to be removed from that team big time.
Alright folks, let's start the new year with a quick feedback round:
What's your number one problem with using KMP today?
What's your number one problem with using KMP today?
January 5, 2026 at 3:13 PM
Alright folks, let's start the new year with a quick feedback round:
What's your number one problem with using KMP today?
What's your number one problem with using KMP today?
I'd make a small bet that they fed the set of available icons and the labels of all menu items into an LLM and had it find the best matches. For like 90% of the icons.
I love a good UI rant, and this one brought receipts
It’s hard to justify Tahoe icons
Looking at the first principles of icon design—and how Apple failed to apply all of them in macOS Tahoe
tonsky.me
January 5, 2026 at 1:31 PM
I'd make a small bet that they fed the set of available icons and the labels of all menu items into an LLM and had it find the best matches. For like 90% of the icons.
December 24th, 9 pm, Eastern Standard Time.
From here on in...
From here on in...
December 25, 2025 at 2:00 AM
December 24th, 9 pm, Eastern Standard Time.
From here on in...
From here on in...
Sometimes it might be a good idea to just #BuildInPrivate
December 21, 2025 at 3:04 PM
Sometimes it might be a good idea to just #BuildInPrivate
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...
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
✨ 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...
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...
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/...
- 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
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/...
- 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/...
Finally! Been really waiting for this. Absolutely psyched.
December 17, 2025 at 10:37 AM
Finally! Been really waiting for this. Absolutely psyched.
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...
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
Last bit: Metro now has a quick start doc! h/t @zsmb.co for the suggestion and review
zacsweers.github.io/metro/latest...
zacsweers.github.io/metro/latest...
If your company name is now Whatever (formerly Something Else) maybe it wasn't necessary to rebrand
December 14, 2025 at 4:18 PM
If your company name is now Whatever (formerly Something Else) maybe it wasn't necessary to rebrand
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...
We'll be officially answering them 3pm-7pm CET.
www.reddit.com/r/Kot...
December 11, 2025 at 2:40 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...
We'll be officially answering them 3pm-7pm CET.
www.reddit.com/r/Kot...
December 11, 2025 at 8:13 AM
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...
We'll be officially answering them 3pm-7pm CET.
www.reddit.com/r/Kot...
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.
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
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.
We're currently discussing if y'all are ready for this yet - we'll probably add it to guidance later.
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
Shoutout to whoever at Google Docs decided that the URL parameter for comment discussions should be `disco`. It's great.
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/
www.reddit.com/r/Kotlin/
December 4, 2025 at 9:50 PM
This is happening in 1 week now!
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
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.
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
A great write-up from Perk about how they adopted Compose Multiplatform! Cool to see this from an app that I actually use regularly.
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
- 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.
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
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
- Jake Wharton
- Philipp Lackner
- Zac Sweers
- Russell Wolf
- Marco Gomeiro
- Chris Krueger
This part of GitHub SSO makes absolutely no sense.
December 2, 2025 at 5:30 PM
This part of GitHub SSO makes absolutely no sense.
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...
Sign up for it here: info.jetbrains.com/k...
December 2, 2025 at 3:24 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...
Sign up for it here: info.jetbrains.com/k...
And we're live! Join us on stream for Advent of Code in Kotlin now:
Advent of Code 2025 in Kotlin. Day 1.
Join us live for five days of Advent of Code puzzles and five Kotlin livestreams on December 1–5!
Solve the puzzles in Kotlin, climb the leaderboard, learn new tricks, and have a chance to win some prizes along the way! Details on how to take part: https://kotl.in/aoc25blg
* Hang out with the supp
www.youtube.com
December 1, 2025 at 5:01 PM
And we're live! Join us on stream for Advent of Code in Kotlin now:
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...
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
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...
I wonder who the first guest will be... Find out later today on the link below!
www.youtube.com/watc...
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.
Teaching something is a great way to deepen your understanding of it.
November 30, 2025 at 12:39 PM
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.
Teaching something is a great way to deepen your understanding of it.
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
KotlinConf 2026 tickets are 20% off for Black Friday! This is your best chance to grab them at a discount.