Mark Senkus refactored the umgc/2025_fall codebase to improve readability and maintainability, focusing on establishing a cleaner architectural baseline for future development. He removed redundant code blocks and optimized function calls, which reduced duplication and simplified ongoing maintenance. Working primarily with Java and leveraging Spring Boot and Maven, Mark’s efforts centered on backend development, ensuring the code structure would support faster feature delivery and easier onboarding for new contributors. Although no critical bugs were addressed during this period, the refactor laid a strong foundation for upcoming features and contributed to a more efficient, maintainable, and scalable backend system.