Worked on geometry processing and visualization for the root-project/root and ferdymercury/root repositories, focusing on robust C++ development and modernizing legacy systems. Delivered features such as parallel overlap checking, quad facet support in bounding volume hierarchies, and an OpenGL-based geometry viewer to replace deprecated components. Applied algorithm optimization and multi-threading to improve performance and scalability, while refactoring geometry handling for maintainability and cross-platform stability. Enhanced the GUI to auto-detect geometry content and updated documentation to guide users through transitions. Addressed build system issues and improved test coverage, ensuring reliable geometry analysis and visualization across diverse platforms and use cases.