Sebastian Aigner 📡
@sebi.io
Dev Advocate at JetBrains. Teaching ∞ Learning Kotlin & Compose Multiplatform. Talking Kotlin. Working w/ with love, for there is no other way. Always iterating.
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...
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
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...
What's new in Kotlin 2.2.21 (and 2.2.20!)
YouTube video by Kotlin by JetBrains
youtube.com
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...
KotlinConf 2026: Call for Speakers
KotlinConf is an official conference by JetBrains. It is devoted to the Kotlin programming language and is the place for the community to gather and d...
sessionize.com
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...
Why JetBrains’ Koog is The Most Advanced JVM Framework For Building AI Agents .
Koog: JetBrains’ JVM framework for building enterprise-grade AI agents.
medium.com
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:
Kotlin Developer Survey 2025
Kotlin Developer Survey 2025.
surveys.jetbrains.com
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...
Kotlin Developer Survey 2025
surveys.jetbrains.com
🎉 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
OH FUN FACT FOR THOSE WHO DONT LOOK AT MY X/TWITTER i drew fanart for this
Sebastian Aigner 📡@sebi.io · last yr.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.
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
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...
Kotlin 2.2 Livestream With the Language Evolution Team
YouTube video by Kotlin by JetBrains
youtube.com
Video of my talk at @kotlinconf.com 2025 now publicly available youtu.be/O0BqoLcRuJI?...
Kotlin and Compose Multiplatform Patterns for iOS Interop | John O'Reilly
YouTube video by Kotlin by JetBrains
youtu.be
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
Live Webinar -
kotl.in
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...
Coroutines and Structured Concurrency in Ktor | Simon Vergauwen
YouTube video by Kotlin by JetBrains
youtube.com
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...
