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Kotlin by JetBrains @kotlinlang.org · 2h

Kotlin’s companions are getting an upgrade. 👀 Kotlin 2.5.0 introduces experimental companion blocks – a lightweight alternative to companion objects. Learn what they unlock and how to enable them 👇 kotl.in/aby7vp

kotl.in

The Companions to Come - The JetBrains Blog

Kotlin 2.5.0 introduces experimental companion blocks and extensions. Learn what they unlock, how to enable them, and what it means for companion objects.

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Kotlin by JetBrains @kotlinlang.org · 01/10/2026

🌐 Ktorfit turns an annotated Kotlin interface into a Ktor client implementation with KSP – Retrofit-style, but for Android, iOS, JVM, JS, Wasm, and native targets. Take a look on Klibs.io 👇 kotl.in/75dnbg

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Kotlin by JetBrains @kotlinlang.org · 01/10/2026

📢 Take the stage in front of 2,000 Kotlin developers in Krakow on April 21–23, 2027. Submit your talk proposal to KotlinConf 2027 ➡️ kotl.in/gnmin6

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Kotlin by JetBrains @kotlinlang.org · 30/09/2026

Kotlin turned 15 this year. What do 15 years of data reveal about the language today? ⚙️ 50%+ of Kotlin devs use it for backend tasks 🤖 81% say AI-generated Kotlin code is correct or needs only minor fixes Explore the State of Kotlin in 2026 report → kotl.in/state-2026-blu

kotl.in

State of Kotlin 2026 | The Kotlin Report

15 years of Kotlin data: adoption, backend, multiplatform, and AI. Read the highlights and download the full State of Kotlin 2026 report.

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Kotlin by JetBrains @kotlinlang.org · 30/09/2026

📢 Kotlin 2.4.21-RC is here! This release brings performance improvements and bug fixes. Changelog: ➡️ github.com/JetBrains/ko...

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Kotlin by JetBrains @kotlinlang.org · 30/09/2026

⏳ The Kotlin Developer Survey closes soon – don’t miss your chance to provide us with feedback that will shape Kotlin’s evolution. Take 15 minutes to share insights we truly value. ➡️ kotl.in/hajfxg

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Kotlin by JetBrains @kotlinlang.org · 29/09/2026

📣 #MultiplatformTip The worst build failure is the one that waits until the end to tell you Xcode was misconfigured. The Kotlin Multiplatform IDE plugin checks your environment up front and flags SDK and Xcode issues before you build. Open the preflight checks 👇 kotl.in/6ukxct

Text mentions that the KMP IDE plugin's preflight checks catch SDK and Xcode issues early. The background is a gradient of purple and blue.

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Kotlin by JetBrains @kotlinlang.org · 29/09/2026

What’s next for Kotlin? We want to hear your take. Make a bold prediction about its future or leave a birthday wish as Kotlin celebrates 15 years, and help us mark this milestone with the community 💌 kotl.in/e0c0qn#kotlin-note

kotl.in

The Kotlin Effect | Write Less. Do More.

Discover the Kotlin Effect. Write less code, do more, and enjoy the process. Watch the video, play the game, and explore learning resources.

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Kotlin by JetBrains @kotlinlang.org · 26/09/2026

Kotlin has turned 15, and the celebration is global! 🌍 Meet fellow Kotlin enthusiasts and mark the milestone together at a birthday meetup near you. Find your city on the map, or organize a celebration of your own 🥳 kotl.in/e0c0qn#meetups

kotl.in

The Kotlin Effect | Write Less. Do More.

Discover the Kotlin Effect. Write less code, do more, and enjoy the process. Watch the video, play the game, and explore learning resources.

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Kotlin by JetBrains @kotlinlang.org · 25/09/2026

High-performance servers need more than individual async APIs. Bowen Feng shows how Kotlin coroutines, flows, channels, and structured concurrency come together as reusable patterns for real backend workloads. Watch the #KotlinConf talk 👇 kotl.in/uv99a7

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Kotlin by JetBrains @kotlinlang.org · 25/09/2026

Join Kodee in the birthday picture and create your own anniversary postcard by uploading a photo 📷 kotl.in/04zwni

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Kotlin by JetBrains @kotlinlang.org · 24/09/2026

🎨 The last 10% of UI work makes an app feel polished. Here are three Compose Multiplatform libraries for that: 🌫️ haze – blur and tint effects 🎞️ compottie – Lottie animations 🌈 MaterialKolor – a Material 3 palette from one seed color More UI libraries on Klibs.io 👇 kotl.in/f0bwrp

A purple gradient background image with JetBrains Multiplatform at the top. Below, the text reads "The Last 10% of Your UI" followed by smaller text: "haze (blur), compottie (Lottie), MaterialKolor (color).

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Kotlin by JetBrains @kotlinlang.org · 23/09/2026

Looking to improve the iOS build speed in your KMP project? Kotlin/Native incremental compilation is available for testing in v2.4.20. Just add a flag in gradle.properties: kotlin.incremental.native=true – no code changes needed. 🧪 Report any issues at kotl.in/issue.

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Kotlin by JetBrains @kotlinlang.org · 23/09/2026

📢 Kotlin 2.5.0-Beta1 is out! Learn more: ➡️ kotl.in/2-5-0-beta1

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Kotlin by JetBrains @kotlinlang.org · 22/09/2026

Spring developers, this KotlinConf talk is for you! In “Bootiful Kotlin”, Josh Long shows how Kotlin fits naturally into Spring Boot – from data access and security to templates, observability, and Spring AI. Watch it here 👇 www.youtube.com/watch?v=_UJs3fkPAr8

youtube.com

Bootiful Kotlin | Josh Long

YouTube video by Kotlin by JetBrains

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Kotlin by JetBrains @kotlinlang.org · 21/09/2026

📱 You can start with Kotlin Multiplatform by sharing your app’s logic between Android and iOS while keeping a native UI on each platform. This tutorial walks you through the setup and shows how the project modules fit together. Build your first KMP app 👇 kotl.in/b1jgop

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Kotlin by JetBrains @kotlinlang.org · 21/09/2026

Ktor 3.6.0 is out! 🎉 The release brings new experimental features, including: 🔶 Typed authentication 🔶 The OpenID Connect plugin 🔶 HTTP/3 support for the Netty engine 🔶 Simpler client setup for Kotlin Multiplatform Read the blog post for more details ⬇️ kotl.in/ioli8u

kotl.in

Ktor 3.6.0 Is Now Available! - The JetBrains Blog

Ktor 3.6.0 is here! This release brings typed authentication, OpenID Connect, HTTP/3 for Netty, and simpler Kotlin Multiplatform clients.

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Kotlin by JetBrains @kotlinlang.org · 18/09/2026

AI integrations can get complex fast. In this #KotlinConf talk, David Denton shows how Kotlin helps keep the MCP SDK design simple: composable functions, clear abstractions, in-memory testing, and less framework magic. Watch 👇 kotl.in/7xmpxa

youtube.com

How Kotlin Powers Functional Design: MCP Edition | David Denton

YouTube video by Kotlin by JetBrains

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Kotlin by JetBrains @kotlinlang.org · 17/09/2026

Ktor gives backend teams flexibility, but flexibility comes with choices. Simon Vergauwen shares an opinionated guide to building Ktor services, from project setup and routing to testing, deployment, and observability. Watch the #KotlinConf talk 👇 www.youtube.com/watch?v=JOZFZ__3M7Q

youtube.com

Opinionated Ktor Services | Simon Vergauwen

YouTube video by Kotlin by JetBrains

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Kotlin by JetBrains @kotlinlang.org · 17/09/2026

🔎 Choosing a Kotlin Multiplatform library? Learn how libraries on klibs.io are indexed and tagged by platform – and how to connect your preferred coding agent. Browse the MCP server, agent skill, and `AGENTS.md` sections to see how it all works. Explore the new docs 👇 kotl.in/xaqwgh

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Kotlin by JetBrains @kotlinlang.org · 16/09/2026

📢 Kotlin devs, we want to hear from you! We're running a survey to understand your day-to-day challenges and experiences with Kotlin – whether it's the language, the tools, or the IDEs. It only takes 15 minutes! Share your thoughts with us here: kotl.in/hajfxg

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Reposted by Kotlin by JetBrains

KotlinConf @kotlinconf.com · 16/09/2026

🔥 The Kotlin community is already planning the next reunion! 📍 Kraków, Poland 📅 April 21-23 KotlinConf 2027 Super Early Bird tickets are now on sale – it’s the lowest price for the biggest Kotlin event of the year. 🎟️ Get yours today! kotl.in/conf27-seb-x

kotl.in

KotlinConf 2027, Apr 21–23, Kraków

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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Kotlin by JetBrains @kotlinlang.org · 16/09/2026

📍 The Kotlin roadmap has been updated! The four directions we're focused on: ✨ Language evolution 📱 Kotlin Multiplatform 🧩 Staying agnostic 📦 The experience of third-party ecosystem authors See what's behind each one 👇 kotl.in/rv5too

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Kotlin by JetBrains @kotlinlang.org · 15/09/2026

Exposed for Kotlin backend development: → Database-first code generation → SQL DSL queries → Ktor server-sent events → Gradle plugin support for migration scripts See it in action in this talk from KotlinConf 👇 www.youtube.com/watch?v=Uoe7ClRkbGI

youtube.com

Flow with Exposed: Life Finds a Way | Chantal Loncle

YouTube video by Kotlin by JetBrains

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Kotlin by JetBrains @kotlinlang.org · 15/09/2026

🎉 Kotlin 2.4.20 is out! Watch @zsmb.co's video for a walkthrough of the main changes 👇 youtu.be/UhRfN7fx5rs?...

youtu.be

What's New in Kotlin 2.4.20

YouTube video by Kotlin by JetBrains

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Kotlin by JetBrains @kotlinlang.org · 14/09/2026

📱 Bringing shared Kotlin code to iOS? Kotlin Multiplatform gives teams several ways to integrate shared code into an iOS app, including direct integration and the Swift Package Manager. Choose the path that fits your project setup 👇 kotl.in/9kbztw

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Kotlin by JetBrains @kotlinlang.org · 11/09/2026

📣 #MultiplatformTip Need to call platform-specific APIs from shared Kotlin code? Kotlin Multiplatform lets you define a common API and provide platform-specific implementations for Android, iOS, web, desktop, and other targets. Learn how expect/actual declarations work 👇 kotl.in/aegmgk

kotl.in

Expected and actual declarations | Kotlin Multiplatform

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Kotlin by JetBrains @kotlinlang.org · 10/09/2026

“No AI, no AI companies, AI-based products, or forced AI usage for development.” In his new interview, Jake Wharton explains why this principle matters to him, and what concerns him about the way AI is changing software development 👇 www.youtube.com/watch?v=9WjPdgOK-68

youtube.com

Kotlin 2026: Layoffs, AI, Google — Is the Golden Age Over? Jake Wharton Explains

YouTube video by JetBrains

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Kotlin by JetBrains @kotlinlang.org · 10/09/2026

📸 Adding image selection or camera capture to your KMP app? ImagePickerKMP provides a single API for camera and gallery flows across Android, iOS, desktop, web, and Wasm – with cropping, compression, permission handling, and a customizable UI. See what it can do on Klibs.io 👇 kotl.in/b2tunt

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Kotlin by JetBrains @kotlinlang.org · 09/09/2026

Building for multiple platforms usually means separate configs for each one. Not anymore 🧰 Kotlin Toolchain 0.12 can publish multiplatform libraries across all compatible platforms from one shared config. Read the full release notes and get started: 👉 kotl.in/0.12.0-bsky

kotl.in

Kotlin Toolchain 0.12: Multiplatform Library Publishing, Wasm Apps, and More - The JetBrains Blog

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

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Kotlin by JetBrains @kotlinlang.org · 07/09/2026

Go deeper into KMP development with Colin Lee’s LinkedIn Learning course, which focuses on building apps for Android, iOS, web, and desktop. Learn how to approach shared UI with Compose Multiplatform, native interfaces like SwiftUI, and more. Start learning 👇 kotl.in/fqptg5

kotl.in

Kotlin Multiplatform Development Online Class | LinkedIn Learning, formerly Lynda.com

Discover the tools you need to start creating multiplatform apps by sharing Kotlin code across Android, iOS, web, and desktop.

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Kotlin by JetBrains @kotlinlang.org · 07/09/2026

📢 Kotlin 2.4.20 is out! Learn more: ➡️ kotl.in/2-4-20

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Kotlin by JetBrains @kotlinlang.org · 04/09/2026

🧩 Working on a KMP project with Android, iOS, desktop, or web targets? The updated default structure gives modules clearer responsibilities, aligns better with build-system conventions, and supports Android Gradle Plugin 9.0 changes. See how the structure works in practice 👇 kotl.in/eqdgdn

youtube.com

Introducing the New KMP Project Structure

YouTube video by Kotlin by JetBrains

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Kotlin by JetBrains @kotlinlang.org · 03/09/2026

Learn and teach backend development with a single Kotlin project 🦆 A new free module in the Programming in Kotlin course uses one runnable Duck Shop to cover HTTP, REST, Spring Boot, persistence, security, testing, and Ktor. Explore the slides and sample project: kotlinlang.org/education

kotlinlang.org

Kotlin for Education

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Kotlin by JetBrains @kotlinlang.org · 03/09/2026

📁 Adding photo uploads, document attachments, or file exports to a Kotlin Multiplatform app? FileKit handles file picking, saving, and creation across platforms – from photos and documents to folders, media capture, and sharing. Explore it on Klibs.io 👇 kotl.in/hc3y0a

JetBrains advertisement for Multiplatform. Text: “Pick, Save, and Manage Files Across Platforms. Discover FileKit on Klibs.io — native pickers, media access, and image utilities for Kotlin Multiplatform apps.”

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Kotlin by JetBrains @kotlinlang.org · 02/09/2026

📢 Kotlin 2.4.20-RC3 is out! Learn more: ➡️ kotl.in/2-4-20-rc3

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Kotlin by JetBrains @kotlinlang.org · 02/09/2026

🥉 The third most common migration route in 2025: Java → Kotlin "People don't go to Kotlin because they have to, but because it offers a better development experience and more modern language features." 📊 New JetBrains Research deep dive: kotl.in/lang-migration-x

kotl.in

Programming Language Migration 2025: Why Developers Switch

This post relates findings about language migration from the 2025 State of Developer Ecosystem survey. In general, project requirements are still the most common reasons for switching languages.

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Kotlin by JetBrains @kotlinlang.org · 02/09/2026

kotl.in

Programming Language Migration 2025: Why Developers Switch

This post relates findings about language migration from the 2025 State of Developer Ecosystem survey. In general, project requirements are still the most common reasons for switching languages.

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Kotlin by JetBrains @kotlinlang.org · 01/09/2026

🎉 Good news: You have more time to learn Kotlin! Free access to select Kotlin courses on Hyperskill has been extended until October 9. Learn through hands-on projects, whether you're just getting started with Kotlin or looking to level up your skills. Explore the courses 👇 kotl.in/a1ityw

Text says: "Free Access to Selected Kotlin Courses." The background is a black and white dotted pattern.

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Kotlin by JetBrains @kotlinlang.org · 01/09/2026

Can your first Kotlin Multiplatform project win a hackathon prize? Rehaan's did: zero KMP experience at Shipaton 2025, learned as he built, took 2nd place. One month left, $30K on the table: kotlinlang.org/lp/shipaton/

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Kotlin by JetBrains @kotlinlang.org · 31/08/2026

📚 Want to create and publish a Kotlin Multiplatform library? In this LinkedIn Learning course, Vladimir Jovanović walks through the process step by step – including setting up a KMP project, writing shared code, testing, and more. Start the course 👇 kotl.in/h3wjkr

kotl.in

Kotlin Multiplatform Libraries Online Class | LinkedIn Learning, formerly Lynda.com

Learn to build, test, and publish a Kotlin Multiplatform library for efficient cross-platform code sharing.

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Kotlin by JetBrains @kotlinlang.org · 28/08/2026

🌱 Learning Kotlin Multiplatform? We’ve got a wealth of tutorials, articles, and courses grouped by skill level – from beginner-friendly introductions to more advanced topics. Find the right resources for your KMP learning path 👇 kotl.in/yus1cw

A promotional image for JetBrains Multiplatform. The text reads “Build Your KMP Skills.” A sidebar menu is visible with items: Kotlin Multiplatform overview, What is Kotlin Multiplatform, Supported platforms, Case studies, Samples, Learning resources, FAQ, and What’s next for KMP.

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Kotlin by JetBrains @kotlinlang.org · 28/08/2026

🛠️ Updating your Gradle version or changing build logic? IntelliJ IDEA keeps helping – even when the script is temporarily broken. With IntelliJ IDEA 2026.2 and Gradle 9.7 or later, resilient sync keeps code assistance working even if part of the build fails. How it works 👇 kotl.in/gylef8

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Kotlin by JetBrains @kotlinlang.org · 27/08/2026

📷 Need to scan barcodes or QR codes in your Kotlin Multiplatform app? KScan helps you add scanning to Compose Multiplatform apps across Android, iOS, and desktop – for tickets, check-ins, inventory, product lookup, and more. Explore it on Klibs.io 👇 kotl.in/smcevz

Screenshot of the Klibs.io page for KScan. The page describes a barcode scanning library using Google’s ML Kit on Android and Apple’s AVFoundation on iOS, supporting QR and EAN-13 formats.

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Kotlin by JetBrains @kotlinlang.org · 27/08/2026

🆕 What’s new in Kotlin 2.4? From stable context parameters and experimental collection literals to Swift export in Alpha and Swift package imports for KMP, Pamela walks us through the release highlights. Watch the overview 👇 bit.ly/4gW7Gjx

youtube.com

What’s New in Kotlin 2.4 | Featuring: Collection literals | Swift Export | SPM import

YouTube video by Kotlin by JetBrains

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Kotlin by JetBrains @kotlinlang.org · 26/08/2026

🆕 Compose Multiplatform 1.12.0 is out! Highlights of this release include: - MCP server for AI agents in Compose Hot Reload - Automatic font fallback for web - v2 version of the window and dialog API for desktop Read more ⤵️ blog.jetbrains.com/kotlin/2026/08/c…

blog.jetbrains.com

Compose Multiplatform 1.12.0 Released - The JetBrains Blog

This release brings MCP server for AI agents in Compose Hot Reload, automatic font fallback for web, and v2 version of the window and dialog API for desktop.

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Kotlin by JetBrains @kotlinlang.org · 26/08/2026

📢 Kotlin 2.4.20-RC2 is out! Learn more: ➡️ kotl.in/2-4-20-rc2

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Kotlin by JetBrains @kotlinlang.org · 26/08/2026

👀 Developers come to Kotlin not because they have to, but because they want to. They’re drawn by its cleaner syntax, fewer rough edges, and development experience that simply feels better. 📊 Read new JetBrains research on how devs migrate between languages: kotl.in/lang-migration-bluesky

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Kotlin by JetBrains @kotlinlang.org · 24/08/2026

🧪 Test your multiplatform app – tutorial The Kotlin Multiplatform testing tutorial shows you how to write, configure, and run tests for common code and platform-specific logic. Explore the guide 👇 kotl.in/w79lgu

The image is an advertisement for JetBrains Multiplatform, featuring text that reads: "Test your shared KMP code. Follow the tutorial to create, configure, and run multiplatform tests." The background includes abstract shapes and colors.

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