Nikita Vlaev contributed to the JetBrains/kotlin-compiler-server repository by upgrading build configurations and managing dependencies to align with evolving Kotlin release candidates. Over two months, Nikita focused on enhancing build stability and test reliability, upgrading the Kotlin version in Gradle and TOML files from beta to release candidate stages. He addressed cross-target type inference issues by refining test assertions in Kotlin, improving error consistency across JVM, JS, and Wasm targets. His work emphasized build configuration, compiler integration, and dependency management, resulting in a more robust CI process and a stable foundation for future features, demonstrating depth in backend build engineering.