Stable Context Parameters dropping 🔥 Refactoring all my Kotlin repositories to have a context parameter Transaction to enforce transaction scopes at compile time in #Kotlin #Exposed

Dokka 2.2.0 release is out! This version focuses on improving the new Dokka Gradle Plugin and K2 analysis, as well as refining documentation behavior. Read the full release notes: github.com/Kotlin/dokka... Follow the thread below for the key highlights ⬇️

Now *this* is the developer experience we envision

OpenTelemetry accepts Kotlin SDK for mobile observability OpenTelemetry has officially accepted Embrace’s Kotlin API and SDK as a contribution to the project. The SDK provides observability suppo... #Infrastructure #cloud #native #CNCF #Kotlin #Kotlin […] [Original post on techzine.eu]

🪷 Needed to clear my cache today. The conference madness is coming. Found a spot near Reichenbachbrücke. Cold. Peaceful. Zero Jira tickets. Marking this location as 'Safe Mode' for when your social battery hits 1%.

KtMongo is looking really nice! If you're using MongoDB in #Kotlin you should give it a try. Considering using MongoDB in a side project just to give KtMongo a try 😄

The countdown to @devoxx.uk is officially in the "getting real" phase. From the latest in #Java & #CloudNative to the cutting edge of #AI agents, the vibes are going to be immaculate. Who are you most excited to see on stage? 👇 devoxx.co.uk

🔥 BREAKING 📰: Kotlin Wasm Component Model support to debut at #hyperlight-wasm workshop during #wasmio26 Don't miss! 2026.wasm.io/sessions/han... #Kotlin #Wasm #ComponentModel #HyperlightWasm

The @kotlinlang.org team has been working on some skills. There is one for migrating your project to AGP 9, done by my super-smart colleague Ilya. Check it out! github.com/Kotlin/kotli...

Good news from kotlinx-rpc! They now have a dev preview available where you can use gRPC with Kotlin Multiplatform! Check out the release notes and resources to try it:

2️⃣ Up to 30% size reduction of production distribution.

2 great improvements Kotlin 2.3.20 brings for #Wasm target users: 1️⃣ Optimizations that * significantly reduce memory consumption during compilation, especially in large projects. ~65% for clean builds and ~21% for incremental builds. * up to 5 times faster incremental builds

I started using #Gradle #MCP yesterday with my coding agents building #kotlin apps. It seems to be quite an improvement. It offers build history, so your agents can easily inspect/search the build without looping --rerun-tasks with tail, etc. Anyone encountered this? github.com/rnett/gradle...

This is... quite smol: @kotlinlang.org #webassembly component compiling down to 64KB.

Check out a sample server using wasi-http built with our early #WebAssembly Component Model support in @Kotlin! 🤩 github.com/Kotlin/sampl... Still early, but very satisfying to see it working ✨ Give it a spin and share what you build 🚀 #Wasm #Kotlin #ComponentModel 1/2👇

Kotlin/Wasm app < Rust 🤯🔥 This is why I’m so excited for Kotlin Wasm! Super curious what amazing things the team will do next! Amazing work 👏👏

The Exposed user survey is still open! If you’re using Exposed, tell us what you think – the good, the bad, and what’s missing. Your feedback will help shape the library’s future. 👉 https://surveys.jetbrains.com/s3/757c90830e4e

Challenging the flexibility of TestBalloon, the DSL-based, Kotlin-first test framework. How much freedom does its API really support? How far can we go if we want to change its look and feel? Join me on my dogfooding journey! infix-de.github.io/testBalloon/...

Junie ranked top on SWERebench using Gemini 3 Flash, spending ~10x fewer tokens than other agents while maintaining high performance. We’re offering free access to Gemini 3 Flash for one week, until next Monday. Try it out and let us know what you think: https://jb.gg/ecer6x

With Air, you can use Codex, Claude Agent, Gemini CLI, and Junie – all with a single JetBrains AI Pro or Ultimate subscription. Prefer your own provider? Bring your OpenAI, Anthropic, or Google API keys or subscriptions and stay flexible. Try Air: jb.gg/4dhmrw

Air just launched. This week we’re highlighting some key features. No single agent is best at everything. Air lets you easily switch between Codex, Claude Agent, Gemini CLI, and Junie, so you can choose the right agent for each task. Try Air for free: https://jb.gg/4dhmrw

Great article! Spot on, and the conclusion can be used in a couple different ways too. You can also use DeprecationLevel.HIDDEN from preventing APIs to be called in certain scopes too.

Are you confused by Gradle terminology? What's a module, a configuration, a build, a project? Unless you're deep into Gradle, they probably aren't what you think. I wrote an article to organize all of that → ivan.canet.dev/blog/2026/03...

Dokka for Material MkDocs 0.5.4 is out! • Kotlin 2.3.0 • Gradle 9.2.1 • Dokka 2.1.0 • Native breadcrumb support dokka-mkdocs.opensavvy.dev

The Kotlin roadmap was just updated! Check out what you can expect the team to work on in the near future. kotlinlang.org/docs/...

I wanna build a time machine just so I can send this post to me in 2012.

Metro 0.11.0 is out now, along with a new proposal system called MEEPs! www.zacsweers.dev/metro-0-11-0... Release: github.com/ZacSweers/me...

🎉 Java to Kotlin conversion is now available in VS Code. We’ve released the J2K Converter extension, enabling seamless conversion of individual `.java` files to Kotlin using the same proven engine as our IntelliJ-based IDEs. Get it now 👇 https://kotl.in/pebpcu

Feedback is so critical for the successful growth of any project. If you use Exposed please let us know how, why and what you use in Exposed and how we can make Exposed better for everyone! Also as always, you can win a prize!

The Vite for Kotlin test suite fails with Kotlin 2.3.0 because... Kotlin Wasm has been optimized enough, that the generated Wasm file is so small, that Vite decides to inline it entirely, so there is no visible Wasm in the output

How was one of the most loved programming languages - Kotlin - created, and what is next after it? This is a rare and special conversation with Kotlin creator Andrey Breslav, with so many fascinating details on how Kotlin became the global success as it is today. youtu.be/ZggUn2mNqMU (cont'd)

OpenSavvy ❤️ Arrow

Spine is really cool! If you’re looking for a great way of doing typesafe routing in Ktor check it out! Now also with Arrow-kt support 😍

We got social media cards now! It uses the short title instead of the long one though… spine.opensavvy.dev/failures-arr...

Spine 0.9.1 comes with bug fixes for #Arrow compatibility for typed #Ktor endpoints: Thanks @skye.codes for the contribution!

This Thursday is the first Belgian #Kotlin Meetup of this year @ DPG Media! 8 spots left! Devs DPG will share how they have adopted #KMP in their iOS and Android apps, and after we’ll have an open space & networking event. It’s going to be super fun. www.meetup.com/belgian-kotl...

🗳️ 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

It's #FOSDEM time! And we have a Kotlin Community stand. Come say hi if you're around!

Joining the #FOSDEM today! Ping us if you want to meet for a coffee and discuss Kotlin.

We're here at #FOSDEM! Visit the Kotlin Community Stand in Building K, level 1 (group A).

Open source friends 🫶 @postgresql.eu @kotlinlang.org

Thursday 12/02 we’re hosting the first BEKUG MeetUp of 2026 at DPGMedia in Vilvoorde! Interested or curious about @kotlinlang.org ? Register for free: meetu.ps/e/PNbwy/sYjb...

A benefit of upgrading to Spring Boot 4 for #Kotlin developers: you will be able to leverage JUnit 6 support for suspending functions to have cleaner tests.

#Kotlin's Ktor HTTP toolkit is pretty cool, having everything I need, like: - Multiplatform support; - Cancellation of HTTP requests; - OpenAPI docs auto-generation. https://blog.jetbrains.com/kotlin/2026/01/ktor-3-4-0-is-now-available/

Ktor 3.4.0 is out! 🎉 The release improves stability and brings new features: 🔶 Zstd compression 🔶 OkHttp duplex streaming 🔶 Structured concurrency for the HTTP request lifecycle 🔶 OpenAPI generation from code Read the blog post for details ⬇️ https://kotl.in/n31gtm

25 years ago, the first-ever JetBrains product was released: IntelliJ IDEA 1.0. To celebrate the occasion, the team invites you to a party with Runzo, our special guest, featuring a game by @glycin.bsky.social, interactive postcards, and exclusive giveaways. https://jb.gg/IJ25

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

From #Either to Raise https://arrow-kt.io/lear...#Either #Kotlin #Arrow #FP

Compose Multiplatform 1.10.0 is out! 🎉 What’s new: ✨ Common @​Preview annotation 🧭 Support for Navigation 3 on non-Android targets 🔥 Stable and bundled Compose Hot Reload Learn more: https://blog.jetbrains.com/kotlin/2026/01/compose-multiplatform-1-10-0/

Yay, I'll be speaking in @amsterdam.voxxeddays.com! Curious about how early returns are used in Kotlin?