During February 2025, Kim delivered the foundational User Management Domain Foundation for the Today-Story/TRIT-BE repository, focusing on backend development and domain-driven design using Java. Kim architected and implemented new controllers, services, and domain models to support authentication, company, creator, and user modules, establishing a scalable structure for future user management features. The work emphasized maintainability and end-to-end traceability, laying the groundwork for streamlined onboarding of new capabilities. Although the contribution was limited to a single feature over one month, the depth of the implementation provided a robust base for subsequent enhancements and improved the overall architecture of the system.