Niraj Budhathoki worked on the skillrx repository, focusing on simplifying and consolidating the tagging system within the Topic model. He unified the LocalizedTaggable and Taggable modules to reduce code duplication and streamline the tagging path, which helped lower technical debt and improve maintainability without altering existing behavior. Using Ruby and Ruby on Rails, Niraj applied refactoring and linting techniques, including RuboCop cleanup, to enhance code quality and set a stable foundation for future development. His work established a cleaner baseline for the repository, enabling faster delivery in subsequent sprints and supporting smoother enhancements to the tagging infrastructure.