Worked on the Esri/arcgis-maps-sdk-toolkit-qt and Esri/arcgis-maps-sdk-samples-qt repositories to deliver a major ArcGIS Runtime SDK upgrade, modernizing the build system and migrating components to QML. Focused on C++ and CMake, the work included refactoring build configurations for improved maintainability and compatibility, reorganizing sample structures, and standardizing licensing headers. Addressed stability by rolling back upgrades and reverting version inconsistencies when needed, ensuring reliable integration with the latest SDK. Emphasized clean code practices and version control, balancing new feature delivery with targeted bug fixes and code reversion to maintain a stable development environment throughout the upgrade process.