Worked on the skkuding/codedang repository to enhance developer experience and code quality by focusing on documentation improvements across core backend services. Leveraged TypeScript and backend development skills to add comprehensive JSDoc comments to services such as ProblemService, UserService, and GroupMemberService, improving code clarity and maintainability. The approach centered on standardizing inline documentation and ensuring consistency across services, which supports easier onboarding and aligns with internal priorities. No major bug fixes were addressed during this period, as the primary goal was to strengthen internal documentation practices and facilitate cross-service collaboration for future API development and maintenance efforts.