During January 2025, Carlos Machado enhanced the data export workflow for the SanPen/GridCal repository by adding a new B [uS/km] column to the exported cable_type data, addressing the need for more comprehensive export outputs. He improved backend robustness by implementing default value handling when expected columns are missing, which prevents runtime errors and ensures data completeness. Working primarily in Python and leveraging his backend development and data engineering skills, Carlos focused on reliability and traceability, as evidenced by well-documented implementation commits. The work demonstrated a targeted, in-depth approach to feature delivery, emphasizing maintainability and resilience in the data export process.