📢 Rare opportunity: my team is hiring! We're looking for a new Developer Advocate to cover server-side Kotlin, focusing on Spring. If you love Spring, Kotlin, and their communities, this might just be for you. Learn more and apply here:

⏳ Just three weeks left to submit your talk for KotlinConf’26! 👉 https://sessionize.com/kotlinconf-2026/ “Don’t forget that we also accept lightning talks! If you feel like your content would have to be padded to fill a regular session, it might be more enjoyable as a lightning talk.” – @zsmb.co

Taking a break from high level languages 🎮

There's less than a month left to submit your talk ideas to KotlinConf 2026! Why not do it today?

Arrow 2.2.0 is out! arrow-kt.io/community/bl... - Raise with context parameters - More DSLs for concurrency, - "At most once" for Eval, - New integration with Result4k

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...

Had an amazing time at #LambdaWorld 25! Gave 2 workshops with @serranofp.com about @kotlinlang.org. Had great chats about Kotlin not the server, for FP, Kotlin Notebooks, @jetbrains.com and @intellijidea.com 😍 You can find the workshops here: jb.gg/tj9qf6 Hope to see you all next year!

You can find the workshop about Pure Functions, Powerful Effects, you can find it here: jb.gg/8obvnt

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...

If you're not on a Kotlin 2.x version yet: what's your blocker for upgrading?

Three of the top educators in the @kotlinlang.org community discussing coroutines 💜 for two hours! 🤯

A conversation around Kotlin coroutines 💜 @sebi.io, @zsmb.co, and @marcinmoskala.bsky.social spent two glorious hours exploring coroutines in depth. 🎙️ If you love Kotlin, you won't want to miss this episode: www.youtube.com/watch?v=1zY4...

I'm super proud of this webinar for underrepresented communities to CFP for KotlinConf. It has been a goal of mine to have this type of encouraging event since I started at JetBrains, and now you can watch the video 🥰 www.youtube.com/watch?v=cTfH...

I've written a small blog post about how context parameters change API design in Kotlin serranofp.com/blog/context... Feedback and discussion is more than welcome!

Context parameters are almost here, let's try migrating a real codebase to them and see what happens! If you've heard of them but haven't had the time to dive yet, follow me to discover what they can and can't do right now, ahead of their final stabilization. ivan.canet.dev/blog/2025/10...

Hi @devoxx.com! I’m at the @jetbrains.com booth this week. Be sure to come say hi if you want to hear about Kotlin! 😬

We just published the 1.0.0-rc01 release for Compose Hot Reload! With this, we are quickly approaching our first stable release. Have you tried Hot Reload yet? Let us know how it's working for you!

Published a KEEP on suspend lambdas and anonymous functions: github.com/Kotlin/KEEP/...

Better immutability in Kotlin with Valhalla www.youtube.com/watch?v=6jam... #kotlin #programming #jvm #jvmls

We now have a dedicated Bluesky account! In the coming weeks we'll be automating release announcements there.

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/