Worked on modernizing the kuduraft repository by refactoring core string and vector utility layers to align with standard C++ library practices. Focused on improving code maintainability and safety, the developer replaced legacy helper functions with standard alternatives and introduced std::string_view interoperability within StringPiece. This migration included updating critical call sites and removing obsolete includes, laying the groundwork for a broader transition to modern C++ types. The work emphasized clear migration notes and a deprecation strategy for legacy APIs, ensuring a smooth transition for future development. Key skills applied included C++, code refactoring, and software development best practices.