During June 2026, contributed to the MTES-MCT/qualicharge repository by developing a Tariff API that aligns with OCPI standards, enabling robust tariff management and integration with charge points. The work involved designing new API endpoints with pagination, refactoring tariff handling logic, and updating models and schemas to ensure consistency and accuracy. Leveraging Python, FastAPI, and SQLAlchemy, the developer implemented comprehensive tests and addressed critical issues such as type errors and VAT handling. Tariff data was exported to an OpenData service for auditability, with enhancements to factories and changelogs, reflecting a focus on reliability and maintainable database management practices.