May 2025 summary: Delivered business-value features and reliability improvements across two repositories, strengthening data integrity, enhancing user experience, and enabling new monetization and engagement features. Implemented a unified exercise data model using Table-Per-Hierarchy with a type discriminator, modernized exam/quiz content handling, and evolved the database schema. In-app currency flows were improved with balance synchronization and a Buy Bonus Module feature. Implemented comprehensive end-to-end progress tracking for sections, quizzes, and exams, with corresponding data models, endpoints, and UI updates. The work reduces runtime errors, improves data consistency, and establishes a scalable foundation for accelerated feature delivery.

April 2025 monthly highlights: Delivered robust API repository test coverage and foundational database schema work, driving higher code quality and safer deployments. Key features delivered include comprehensive API repository tests across core entities and workflows, plus migrations and cleanup that stabilize the test database state. Major bugs fixed include ensuring missing tables are created and repo test failures resolved. Overall impact: improved test reliability, faster CI feedback, and stronger confidence in API changes. Technologies demonstrated: unit testing across repository layer, DTO usage in tests, database migrations, test data design, and test artifact cleanup.