Worked on enhancing financial calculation accuracy across the Hyperion and Titan repositories by migrating all monetary values from floating-point to integer-based cents representation. This approach reduced rounding errors and improved auditability by ensuring backend calculations used precise integer arithmetic, while the frontend continued to display user-friendly euro values. Collaborated with other contributors to align data models and display logic, enabling consistent financial reporting and reducing risk in monetary transactions. Utilized Dart and Python for backend development, API integration, and database management, applying these skills to both feature implementation and bug fixes during the month-long period of focused backend and API work.