THE COMPANY INDEX TRACKED BLOG
Ideas, decisions, and lessons from the team.
blog.jetbrains.com (opens on the source site)XThe Kotlin Toolchain is a unified entry point into Kotlin. It lets you build JVM, Android, iOS, multiplatform, and server-side applications with a simple declarative configuration. With the release of v0.13, we now recommend the Kotlin Toolchain for most new Kotlin Multiplatform (KMP) projects. Earlier this year, we promoted the Kotlin Toolchain to Alpha. Since […]
Read at the sourceStarting with IntelliJ IDEA 2026.3 and Android Studio Rabbit 2 | 2026.2.2, we’re discontinuing Swift language IDE features in the Kotlin Multiplatform (KMP) plugin. This includes editing, syntax highlighting, and navigation within Swift files and between Swift and Kotlin. Running iOS applications and debugging Kotlin code on iOS will remain fully supported. Kotlin/Native functionality, such […]
Read at the sourceWe are working on extensions to our companions mechanism to unlock new code patterns and improve interoperability across different platforms. This post outlines these new features and provides preliminary guidance on migration. Companion blocks and extensions Many programming languages provide a notion of class or type members – functionality that does not belong to each […]
Read at the sourceIn 2026, Kotlin turned fifteen. Over those fifteen years, Kotlin has built a mature ecosystem, been adopted by companies around the world, and established a large and active developer community. Fifteen years is long enough to understand which technology trends lasted and which didn’t. This report looks back at Kotlin’s first fifteen years to see […]
Read at the sourceThe current compilation approach to Kotlin Multiplatform projects works, but sometimes can lead to unexpected or hard-to-predict behavior. For example: With Kotlin 2.5.0-Beta1, we introduced an optional “separate compilation” approach to KMP that solves both problems: make the compilation results consistent with IDE analysis, and point more consistently to problematic calls of library code from […]
Read at the sourceKotlin Toolchain 0.12.0 is out. This release brings some long-awaited features: multiplatform libraries publication, a preview of Wasm application support, Compose Hot Reload from the command line, and more. Read on for the details, and check the release notes for the full list of changes and bug fixes. Additionally, klibs.io now uses the Kotlin Toolchain […]
Read at the sourceHere’s a function that signs a document: In Kotlin, Unit means the function completes without returning a meaningful value – roughly equivalent to void in Java. Got it? Now, tell me what could go wrong. You can’t. Yet, the code might be invalid. The signing window might have closed. The database might be down. The […]
Read at the sourceExplore a growing Kotlin Multiplatform catalog in your browser, or bring up-to-date library data directly into your AI development workflow through the klibs.io MCP server. When we introduced klibs.io in December 2024, the goal was simple: make it easier to find a Kotlin Multiplatform library that fits both your use case and target platforms. Since […]
Read at the sourceSomething is happening in server-rendered web development. React shipped Server Components. HTMX made “hypermedia” cool again. Phoenix LiveView proved a server can push interactive UI updates without a client framework in sight. Every ecosystem seems to be rediscovering the server as a place to render UI, except one: the JVM. What if Compose, the UI […]
Read at the sourceTL;DR: 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. One outlier from this trend, however, is Kotlin. People switch to Kotlin not because they have to; they switch because it simply feels better to work […]
Read at the sourceHi everyone! July gave me plenty to celebrate: Kotlin turned 15, got its first public benchmark for AI coding agents, became available in BlueJ, and shipped its 2.4.10 release. Developers can also demonstrate their skills at RevenueCat Shipaton 2026 by building a Kotlin Multiplatform app and competing for the Ship Kotlin Everywhere Award. Meanwhile, X […]
Read at the sourceSomewhere in your notes there’s an app idea waiting for a free weekend that never comes. Consider this its official deadline: RevenueCat Shipaton 2026, the world’s biggest mobile hackathon, runs August 1 to September 30. If you know Kotlin, that idea is closer to the App Store than you think. Join the Shipaton The Ship […]
Read at the sourceQodana 2026.2 makes it easier for development teams to act on code quality, security, and compliance findings throughout the development workflow. This release introduces clearer code coverage insights for pull requests, highlights uncovered new lines directly in the IDE, and automatically detects coverage reports in common project locations – reducing the configuration required to get […]
Read at the sourceThis tutorial was written by an external contributor. APIs are frequent targets for bad actors since they expose data and functionality. Securing them while maintaining usability is often one of the most challenging and time-consuming parts of API development. OAuth 2.0 and JSON Web Tokens (JWT) help make these processes more manageable and reliable. They […]
Read at the sourceTL;DR KotlinLLM is now public. It’s a research prototype for delegating runtime logic to an LLM from Kotlin code. Instead of calling an LLM on every request or running a separate agent, you can write an explicit Kotlin call. Its body is generated Kotlin source code, and that code is updated as your application hits […]
Read at the source🎉 Kotlin turns 15! 🎉 For 15 years, you’ve helped shape Kotlin into the language it is today. Whether you’ve built apps, contributed to the ecosystem, taught others, or simply chosen Kotlin for your next project – thank you for being part of the journey. Today, we’re celebrating Kotlin and the people who have made […]
Read at the sourceA few years back, the Kotlin team figured it was time their programming language had a mascot – something fun and friendly to make developers feel more at home. After all, so many other programming languages have their own characters – Gofer, elePHPant, Dart’s Dash, or Rust’s Ferris, for example. Bringing Kodee to life wasn’t […]
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