Over two months, this developer delivered 17 features and fixed bugs across the Food-Change-Mood and Plan-Mate repositories, focusing on backend systems and data management. They implemented a CSV-based audit logging system in Plan-Mate, establishing end-to-end auditability with robust error handling, UUID-based IDs, and comprehensive tests. In Food-Change-Mood, they enhanced game logic, improved exception handling, and prevented data duplication, while refactoring code for maintainability. Their work emphasized dependency injection, repository patterns, and test-driven development using Kotlin, Java, and Gradle. By building reusable data layers and UI components, they improved traceability, governance, and code quality across both projects.