Worked on the engine-flutter-autoroll/flutter repository to address a critical issue in the Windows platform integration of the Flutter Engine. Focused on C++ development, the work involved correcting the handling of GetLastError by explicitly casting its result to an int, which resolved a type-mismatch that previously caused build-time failures. This fix improved error code handling and enhanced the stability of the integration across Windows builds. The approach emphasized robust error handling and ensured traceability by mapping the solution to a specific upstream engine change, providing clear auditability. The work demonstrated attention to platform-specific details and careful management of integration points.