During May 2025, Zoulourns developed GPS HDOP sensor support for the ESPHome GPS component in the Fmstrat/esphome repository. This work introduced a new configuration option for HDOP, updated the processing and publishing pipeline to expose HDOP values, and enhanced logging to include HDOP data for improved signal quality diagnostics. Using C++ and Python, Zoulourns focused on embedded systems and sensor integration to provide more reliable GPS signal-quality reporting and better traceability for deployments. The feature was delivered with disciplined versioning and addressed a clear need for improved diagnostics, demonstrating depth in both technical implementation and business value.