Elia worked on the Shopify/theme-tools repository, focusing on optimizing the Theme Language Server to improve performance and memory efficiency. Using Node and TypeScript, Elia implemented a targeted preloading strategy that limited file processing to relevant Shopify theme directories, such as assets and templates, thereby reducing unnecessary heap growth. The update included changes to the DocumentManager, ensuring only theme-specific files were loaded and preventing large, unrelated JSON files from inflating memory usage. Delivered as a single, low-risk commit, this feature enhanced scalability for large theme repositories and improved developer feedback loops, demonstrating thoughtful full stack development and testing practices.