KotlinConf is the official Kotlin conference by JetBrains. It is a place for the community to gather and discuss all things Kotlin.

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Read the full release notes: https://kotlinlang.org/docs/whatsnew2420.html Kotlin 2.4.20 is out! This release includes some exciting new additions in the standard library, updates to the iOS development experience, and improvements to both the Wasm and JS targets as well. Chapters: 0:00 Intro 0:29

Kotlin Developer Survey 2026.

YouTube video by Kotlin by JetBrains

YouTube video by Kotlin by JetBrains

Kotlin Toolchain 0.12.0 is out, with multiplatform library publishing, a Wasm app preview, Compose Hot Reload from the command line, and more.

This release adds a few quality of life features and bumps up some versions. [versions] compose-runtime = "1.12.0" kobweb = "0.25.1" kotlin = "2.4.10" [libraries] com...

Kotlin 2.4 is packed with some especially nice features and improvements from the Kotlin team. From language updates, to standard library additions, and finally platform-specific updates, this video will make sure you’re in the know! Links: Full blog post: https://kotl.in/9ms3xb Explicit Backing

Share your Ktor endpoints between client and server

Agent Tools for Kotlin to make coding agents more efficient with Kotlin & Gradle - nomisRev/agent-tools-for-kotlin

Magic: The Gathering has over 28,000 unique cards. Each one can interact with every other in ways the designers never anticipated. The comprehensive rules document is over 200 pages long.I decided to ...

YouTube video by Dave Leeds

Concise. Multiplatform. Fun.Kotlin is a concise, cross-platform programming language developed by JetBrains.Expand your Kotlin skills with the official YouTu...

The next MongoDB driver for Kotlin

Amper 0.11.0 is out, and has evolved into the Kotlin Toolchain! It is now Alpha, and brings a ton of improvements with it.

Kotlin Foundation – protect, promote and advance the development of the Kotlin programming language.

OkHttp, Okio, Retrofit, and SQLDelight join Commonhaus under the lysine.dev banner

YouTube video by Dave Leeds

Hello, Currently, under the normal type system, Null is a magical type. It’s not really a class (despite how it’s presented in the doc. It has special rules to make it a subtype of every reference class type. This is illustrated by the following class diagram: Under -Yexplicit-nulls, Null is less magical. In the core type system, it is almost a regular class (with a single instance null), which extends Matchable (and hence Any). There are no special subtyping rules in the core type system f...

Share your Ktor endpoints between client and server

UUID reference documentation https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.uuid/-uuid/ UUID KEEP discussion https://github.com/Kotlin/KEEP/issues/382 Kotlin 2.0.20 release notes https://kotlinlang.org/docs/whatsnew2020.html#support-for-uuids-in-the-common-kotlin-standard-library 0:00 Intro

Arrow 2.2.3 is out!

A finance-driven framework for CTOs and VPs of Engineering evaluating Kotlin adoption. Covers investment metrics (NPV, IRR), migration costs, governance, and enterprise evidence patterns. By Yuri Gero...

Changelog Backend. J2KLIB KT-86367 [JKLIB] kotlin.Cloneable built-in class not found Compose compiler b/511102714 Made the default stability of non-final classes Unknown instead of Stable Tools...

The perfect companion for your Kotlin journey