Remia focused on improving code quality in the facebook/folly repository by addressing a persistent build issue related to variable shadowing. Using C++ and leveraging skills in code refactoring and debugging, Remia systematically renamed local variables to prevent conflicts with parameters or member variables, following the Folly convention of appending a _2 postfix. This targeted fix resolved compilation failures under strict buck2 build settings with -Wshadow-all and -Werror=shadow-uncaptured-local enabled. The work enhanced code readability and maintainability, ensured compliance with coding standards, and unblocked the build process for dependent projects, demonstrating careful attention to detail and effective problem resolution.