Minseon worked on the Techeer-Hogwarts/backend repository, where she developed an admin-only API to close study recruitments by marking StudyTeam entities as finished. She implemented robust admin authorization checks and explicit handling for unauthorized access, enhancing both security and auditability. Her work focused on backend development using Java and Spring Boot, leveraging RESTful API principles to ensure maintainable and testable code. Minseon also refactored the StudyTeam module, applying targeted code quality improvements and aligning formatting with project standards. Over the course of the month, her contributions addressed administrative control needs and improved the overall maintainability of the backend system.