Worked on enhancing the reliability and interoperability of the EVerest/libocpp backend by addressing a bug in the GetCompositeScheduleRequest feature. Focused on improving how optional charging rate units are handled, the solution involved validating supported units and ensuring the system gracefully manages cases where the unit is missing or unsupported. This approach prevented incorrect request rejections and improved compatibility across diverse OCPP deployments. The work was implemented in C++ and leveraged backend development expertise, resulting in greater system stability and reduced support overhead. The targeted fix contributed to a more robust integration experience for users relying on OCPP protocols.