At KotlinConf 2025, JetBrains outlined the future of Kotlin, emphasizing substantial advancements in security, speed, and AI capabilities for on-premise environments. Key announcements included the adoption of the K2 compiler, which improved build times by 40%, and the introduction of Kotlin 2.2, featuring enhanced security with built-in guard conditions. Furthermore, the Koog framework and Mellum LLM have been open-sourced, enabling offline AI development solutions. The event also celebrated the stable release of Compose Multiplatform for iOS, solidifying Kotlin’s push for a unified development experience across platforms.
"Kotlin’s maturation is marked by improved security and performance, alongside the transition to the K2 compiler, significantly reducing build times."
"The introduction of guard conditions makes switch statements safer, while must-use return values ensure important function outputs aren't overlooked."
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