Sebastian Aigner 📡

Master Kotlin coroutines with @sebi.io in a hands-on workshop at KotlinConf’26. Build reliable, high-performance concurrent systems – the right way. 🗓️ May 20 • 📍 Munich ⚠️ Seats are limited. Save your spot now 👇👇👇 https://kotl.in/coroutines-workshop-xbs

🗳️ Help us understand how you use Exposed! We’re running a short survey to learn how Exposed is used in real projects and where the experience can be improved. ⏱️ Just 5 minutes to make a big impact. Take the survey 👉 https://surveys.jetbrains.com/s3/757c90830e4e

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

With Kotlin Coroutines, you can build performant and reliable systems. But to do so, you need a solid understanding of the mechanics that govern how they work. Come join my KotlinConf workshop to learn everything you need to know! kotlinconf.com/workshops/

✨ 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...

The Call for Speakers for KotlinConf 2026 is still open! I'm not exaggerating when I say it's *the* Kotlin event of the year. Please submit to the CFP! Being a speaker is a really exciting way to experience KotlinConf, and share what you know! ❤️ sessionize.com/kotlinconf-2...

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...

KotlinConf 2026 CFP is open! 🔥 Looking forward to all your awesome submissions, and hearing about all the cool things everyone has been up to😁 sessionize.com/kotlinconf-2...

Koog, the Agentic AI framework for Kotlin that we're building at JetBrains, is, well, kind of cool. Especially since it's not designed for toy projects, but to ✨ scale ✨! Learn more: medium.com/@vadim.brili...

If you have feedback about *anything* around Kotlin, this is the time to have your voice heard in our annual Kotlin Developer Survey. The language, the tooling, the ecosystem, Kotlin Multiplatform, Compose... It's all in there! Takes just 10 minutes:

We're running the Kotlin Developer Survey 2025; make your voice heard! 🎤 Help us understand what's great when working with Kotlin, and what's not! You'll help make Kotlin better not just for yourself, but for everybody! Thanks in advance ❤️ surveys.jetbrains.com/s3/68aaa1b46...

🎉 New Talking Kotlin episode! @sebi.io chats with Alex Sysoev, author of KotlinX RPC, an experimental but powerful library for building RPC services and clients in Kotlin. Watch on YouTube 👉 kotl.in/572emq

@sebi.io as he's looking at our YouTube channel (Subscribe here! www.youtube.com/@Kotlin)

A nice conference about #ComposeMultiplatform for iOs and more by @sebi.io at #KotlinConf 25 www.youtube.com/watch?v=YKTl...

OH FUN FACT FOR THOSE WHO DONT LOOK AT MY X/TWITTER i drew fanart for this

Kotlin coroutines are great. Their core primitive is the suspending function. With a small change in your IDE settings, you can give them a custom color (like a bright green), which makes it easy to spot them at a glance, even when you're looking at a lot of code.

the brain that can see a face in a wall outlet was always doomed to hear the voice of God in a markov chain

something something @nanami.codes something something this looks so ass IM SORRY

@nanami.codes found you a date

And as a reminder, you can already run the same code on iOS, web (hah) and desktop already. You even get Compose Hot Reload for live tweaking in that last case!

If you’re a Kotlin library maintainer, consider submitting to the Kotlin Foundation Grants program for a chance to get financial and promotional support for your library! 🚀 Deadline is July 31, don’t miss it!

Somehow I missed the livestream with @sebi.io and the Kotlin language designers! I don't know how it happened 🤯 Did you miss it too? Quick, let's watch it before they notice! www.youtube.com/watch?v=jne3...

Video of my talk at @kotlinconf.com 2025 now publicly available youtu.be/O0BqoLcRuJI?...

In two days Mikhail Zarechenskii, @sebi.io and I will be exploring the new features of @kotlinlang.org 2.2 in a livestream. Learn about the new tricks, and ask any questions you may have! 📅 July 10 ⏰ 4:00 pm CET 👉 kotl.in/2-2-livestream

At KotlinConf 2025 I gave a 15m talk stuffed with all the information I could about Structured Concurrency and Coroutines in Ktor! 🗣️ KOTLIN SERVER SIDE PEEPS! Perfect for a small break in this heat 🥵 Grab a drink & stay hydrated during these warm days! www.youtube.com/watch?v=JxTI...

New favourite piccie from the past week at @droidcon.bsky.social New York with the absolute legend that is @sebi.io ! If he still has the AI altered version of this it's absolutely hilarious & will likely be his new Greatest Hits Album cover ;) ;) #dcnyc25

“Compose Multiplatform for iOS: Ready for Production Use” 🚀 In this KotlinConf’25 talk, @sebi.io shares what’s new, what’s under the hood, and what’s next. 📺 Now available on Kotlin YouTube: kotl.in/conf-compose...

Was watching @sebi.io's fantastic video on using Kotlin MCP SDK to control Hue lights (www.youtube.com/watch?v=jwev...) and he mentioned you could also run IntelliJ as MCP server....so used prompt here to build project (using Android Studio in my case) and set office lights to green if successful 😀

i love kotlin

Really impressive demo by @sebi.io using Junie AI with Compose Hot Reload #KotlinConf

We have new AI Assistant and Junie licenses and pricing, including FREE access! Check it out below:

Great session today (@zsmb.co was also hosting). Testament to maturity of KMP that related question are getting more detailed each year. Lot of CMP questions this year as well.

🙂

Yes, hot reload really is 🔥 #Kotlin #KMP #CMP youtube.com/shorts/xgtHm...

@jetbrains.com has joined the chat. Tried Junie's EAP version with my github.com/iurysza/modu... project. IMO the sweet spot for these kind of tools are projects with a clear (and narrow) scope. Worked super well so far. I liked how it was smart enough to figure out how to run tests by itself.

Enjoyed presenting at Appdevcon in Amsterdam on Kotlin Swift Export.

Compile time DI verification with #koin in #kotlin! The Koin project has grown incredibly over the years. Impressive work 👏👏 Always amazing to see #OSS projects grow with the community, and language. It’s really marvellous to see what motivated people can accomplish working together. 🥰

Junie is such a huge help for quickly getting an implementation of e.g. an API client. For a video, I was implementing smart light control with MCP, and I was able to delegate the REST client entirely to our agent. Fewer mechanical tasks, more focus on the things that matter 🚀 youtu.be/jwevCa96Z4Q

www.youtube.com/watch?v=jwev... Kotlin 🤝 MCP @sebi.io nailed it on this one! I rly want to try this out! github.com/SebastianAig...

🔥🔥 Hot Reload for Compose Multiplatform is a game changer for iterating on your UIs – it allows you to instantly see and “feel” the changes you make as you tweak your app! Give it a try! 🧵👇

nothing hotter than attention to detail

There’s nothing I love more than going through an entire login flow in a web app only for it to realize at the very last stage that it wanted to deep link into the app instead. You know, the app that’s already authenticated. Great stuff.