The photos of our first edition are up over at ktconf.be/photos Feeding your FOMO so you decide to come next year. 😬

One of my outcomes of @ktconf.bsky.social is an improved version of my "FIR Tree" plug-in, that now can show the statements/implications in the Control Flow Graph plugins.jetbrains.com/plugin/23270...

Couldn’t be happier with yesterday’s 1st edition of KTConf.be. Some quick stats: We had a total of 59 Kotlin fans attend, including 8 speakers, of which 5 international ones. Big shout out to Kunlabora, Triple D, DPG Media, PTV Logistics and of course @jetbrains.com for their amazing support.

Today is @ktconf.bsky.social, the first Kotlin conference in Belgium! 🔥 I’m super exciting being here, and talking everyone’s ear off about Kotlin. Today I’m talking with my colleague Maria on how to “Koog your own AI! Delicious recipes” 😋

Thinking about submitting a KotlinConf talk? ✨ @pamelaahill.bsky.social and @cheuk.dev are hosting a livestream to help you turn your idea into a compelling KotlinConf proposal. Save the date: kotl.in/live-oc25 Your voice belongs here.

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...

Lots of niceties for the smart cast lovers in @kotlinlang.org 2.2.20: - New kinds of contracts - Data flow-based exhaustiveness kotlinlang.org/docs/whatsne...

⏳ The Kotlin Developer Survey closes soon – don’t miss your chance to provide us with feedback that will help guide Kotlin’s evolution. Just 10 minutes to share insights we truly value. 👉 kotl.in/dev-survey-25

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:

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

Are you using ignoreUnkownKeys = true with KotlinX Serialization? Then maybe you've missed the recent release of @ JsonIgnoreUnkownKeys. Allows you to create exceptions to strict parsing in the case of legacy schemas, flaky APIs, or library development! kotlinlang.org/api/kotlinx....

My new video on Kotlin 2.2's nested type aliases feature is now available! WDYT? 🎸🎸🎸 www.youtube.com/watch?v=1W6d...

Context-sensitive resolution for @kotlinlang.org!!! Aka “stop asking me to write the name of the enumeration class 1000 times, I’ve already told you”

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...

The KTConf.be 2025 schedule is live. On September 19th at Terhills Hotel in Maasmechelen, we’ll gather Kotlin developers for a day of talks, discussions, and networking. We still need to fill a few more seats. If you’ve been considering joining, now’s the time. #KTConf #Kotlin #Belgium #KTConf2025

Ya para socios: Clara Grima, matemática: "Mis clases parecen despedidas de soltero, en informática a veces no hay ni una mujer" www.eldiario.es/128_be0133?u...

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.

People have been asking for the Git client from IntelliJ to be available as a standalone app for almost a decade. You can now get it in early access - see the link below for details! lp.jetbrains.com/clo...

It turns out a “Kotlin Multiplatform” T-shirt can be the ultimate conversation starter

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

just a reminder - there is a #kotlin starter pack maintained by @iamkonstantin.eu

KTConf 2025 schedule is live! 🗓️🔥 Talks by Ivan Canet, Simon Vergauwen, Duncan McGregor, Alejandro Serrano Mena and others. 🎤 Kotlin, FP, MongoDB, and smart code insights. 📍 Sept 19 – Terhills Hotel, Belgium 🎟️ Tickets available: ktconf.be #ktconf #kotlin #devconference #programming #belgium

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

Want to get more out of your JVM? Join @vergauwensimon.bsky.social and Jiří Holuša to learn about how Kotlin and Azul Runtime boost performance and cut latency (and how JetBrains and Azul collaborate). Save the date: 📆 July 16 🕓 4:00 pm UTC info.jetbrains.com/kotlin-lives...

"Rich Errors in Kotlin” – the KotlinConf’25 talk by Michail Zarečenskij is now live on our YouTube channel! 🎉📺 Discover how Kotlin’s nullability model can be generalized to restricted union types for better error handling. 👉 Watch the full video: kotl.in/richerrors

I really love this language feature! It removes so much boilerplate, and besides enums it makes working with sealed classes, and when blocks/statements so much cleaner.

Not one, but two features starting with "context"! Indeed, there are quite some new language features in preview in this release. Tell us what you think! kotlinlang.org/docs/whatsne...

You can now watch the recordings from KotlinConf on the website - and they're also in the app, in case you quickly wanna find the recordings of sessions that you've bookmarked earlier! kotlinconf.com/talks/

The @kotlinconf.com talks are up! 👏 Here's the recording of my talk "Quest for the Orb of Ko-dee" / "The wonders of smart casting" kotlinconf.com/talks/779829/

Watch KotlinConf 2025 anytime! 💗 All session recordings and event photos are now available online. Explore the latest in Kotlin from wherever you are. 🎤 Sessions: kotlinconf.com/talks/ 📸 Photos: kotlinconf.com/photo/

This is one of my favorite conferences. Cádiz in Spain during October is a gift by itself. The community is vibrant, and diverse. All languages feel represented there. I send in 2 CFPs and a workshop, really hoping to not miss it this year 😄 Hoping you won’t either! Looking forward to seeing you!

Please do not forget we want *you* to speak about Functional Programming at lambda.world. The CFP is at confeti.app

Some people hear “ #Haskell 's type system eliminates entire classes of bugs” and think “Cool, no tests needed”. But what you should hear is “Cool, we can focus on more interesting tests”. Golden tests, property tests, doctests… wiki.haskell.org/index.php?ti...

The new version of my book "Functional Programming Ideas for Curious Kotliners" has been released! The final version has been updated to use context parameters, and contains updated sections on persistent collections and composables. leanpub.com/fp-ideas-kot...

New KEEP (@kotlinlang.org feature proposal) about static members and type extensions. Read and leave your feedback at github.com/Kotlin/KEEP/...

Do you have ideas, tips (or even flops) to share with the Functional Programming community? lambda.world is *your* place. The CFP is already open!

We can’t wait to start? Same for you? #Java30Countdown #Java30

The quest for the Orb of Ko-dee with @serranofp.com

🎉 The new Kotlin Multiplatform for IntelliJ IDEA and Android Studio! ✨ Integrated New Project wizard 🔍 Preflight checks 🔧 Multiplatform run configurations 🧭 Cross-language support 🎨 Compose Multiplatform support 🔥 Compose Hot Reload Learn more blog.jetbrains.com/kotlin/2025/...

Will you be at #KotlinConf and are working on an open-source library—or love one you'd love to share? During both days, at the noon pauses, at the Kotlin Foundation booth, you'll be able to talk about your favorite library for a few minutes! Register here: docs.google.com/document/d/1...

New 2.1.2 release of Arrow! Apart from various bug fixes, we’ve lowered the requirements to Java 1.8, Android 21, and Kotlin 2.0.

Don't forget to register for KtConf in Belgium! We don't often see new conferences, let's get this off the ground! ktconf.be

Super excited! Finally, we got #Kotlin at home 🥰 🇧🇪 Cannot wait to see you all there. Sorry not sorry for the secrecy 😁

R2DBC is huge! That means you can integrate Exposed and take advantage of more reactive and concurrent drivers!

#Kotlin Exposed just dropped 1.0.0-beta-1 🔥🔥 With #R2DBC support! 😍 The (Exposed) cuttlefish is well-known for its outstanding mimicry ability that enables it to blend seamlessly into any environment (or dialect 😉). And now reactively! github.com/JetBrains/Ex...

I've been updating my book "Functional Programming Idea for the Curious Kotliner" for the coming of context parameters, and reworked a few sections. Is somebody interested in reviewing those changes? (If you help with the review, you'll get a digital copy of all my books for free -- send DM).

It's finally live! www.youtube.com/watch?v=9jGM... If you want to learn all about the planned (and unplanned) future Kotlin versions, this is the video to watch! (the first 3 minutes are in French but you can enable subtitles)

💬 Have you used Kotlin’s documentation recently? We want to hear from you! Share your thoughts in our Kotlin Documentation Survey and help shape a better experience for developers like you. 🔗 surveys.jetbrains.com/s3/kdocs-blu...

Another #KotlinConf around the corner 😍 Not a single edition was disappointing, in fact I went home energised and full of ideas and excitement to build more things in #Kotlin. This year will be special for me, since after 4 editions I'll be joining as an employee 😱 Find me at the booth 🥰