Kotlin 2.3.0-RC: A New Era for Kotlin Developers

The team behind Kotlin — the cross-platform, statically-typed language from JetBrains — just released version 2.3.0-RC (release candidate), and the batterybet updates look substantial enough to shake things up for many devs.

One of the headline features is improved support for newer platforms: Kotlin continues to evolve across JVM, JavaScript, WebAssembly, native builds and multi-platform targets, giving developers sharper tools for cross-platform codebases.

But beyond platform support, there’s rumor (and growing community chatter) around enhanced compile-time checks. The community hopes that the upcoming stable release will include new safety mechanisms, optimized type-checking, and possibly stricter defaults to help catch bugs earlier — echoing the general direction Kotlin has taken in recent releases.

For teams working large-scale or multiplatform apps — whether backend, frontend, mobile, or native — this update could help streamline builds, reduce subtle platform-specific bugs, and simplify maintenance. Kotlin is increasingly not just a “nice to have” for Android developers, but a serious contender for full-stack, multiplatform projects.

If you’ve been on the fence about adopting Kotlin — or using it only for small parts of your stack — 2.3.0-RC might be a good excuse to revisit. It feels like Kotlin is pushing hard toward broader adoption and more robust tooling across the board.