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Explore the upcoming enhancements for Kotlin developers in this 42-minute conference talk from Spring I/O 2025. Discover how the Spring and Kotlin teams are collaborating to elevate Kotlin support in Spring Boot 4, built on Spring Framework 7 and scheduled for release at the end of 2025. Learn about the new Kotlin 2 baseline and how it improves both developer experience and runtime efficiency for Spring Boot applications. Examine runtime performance optimizations, enhanced null-safety features through JSpecify integration, and specialized GraalVM native image support for Kotlin applications. Delve into new domain-specific languages (DSLs) designed for Kotlin developers, updated Kotlin documentation, and the integration of Spring AI with Kotlin. Gain insights into practical implementations through the accompanying Spring PetKlinic repository and comprehensive slide materials from this cutting-edge presentation by Sébastien Deleuze.
