Eugenie Kim refactored the CS-Winter2025/backend repository to establish a modular, maintainable backend architecture using C#. She reorganized models and controllers into dedicated Areas folders, renaming files to reflect their new structure and reduce cross-module coupling. This backend development effort focused on code organization and refactoring, laying a foundation for scalable feature development and streamlined onboarding. Eugenie captured the entire change in a single commit with explicit rollback instructions, ensuring safe reversibility. Her work improved testability and maintainability, enabling independent feature teams and faster integration workflows while demonstrating strong skills in modular design, clean refactor practices, and Git version control.