During December 2024, Alejandro Carrillo focused on backend development for the EVerest/libocpp repository, addressing reliability and interoperability in OCPP-based systems. He delivered a targeted bug fix in C++ that improved the handling of optional charging rate units within the GetCompositeScheduleRequest workflow. By validating supported units and gracefully managing cases where the unit was missing or unsupported, Alejandro prevented incorrect request rejections and enhanced compatibility across diverse deployments. This work reduced support overhead and contributed to overall system stability. Although the period did not include new feature development, his contribution demonstrated careful attention to protocol compliance and robust backend engineering practices.