Worked on enhancing the Kotlin language server by introducing a Scoped/Isolated Documents Mode in both the kotlin-lsp and JetBrains/intellij-community repositories. This involved designing a modular architecture in Kotlin and Java to enable per-document isolated analysis, overlayed indexing, and scoped request handling, supporting multiple clients and concurrent edits. Developed a dedicated module to improve code completion in scoped mode, optimizing project structure handling and reducing cache invalidations for faster, more accurate suggestions. The work established a scalable foundation for multi-repository LSP deployments, focusing on backend development, concurrency, and Language Server Protocol integration to improve responsiveness and reliability in IDE environments.