Worked on enhancing diagnostics and initialization reliability across the apache/incubator-gluten and IBM/velox repositories using C++ and system design expertise. Improved logging for aggregate function signature validation in apache/incubator-gluten, providing clearer insights into input types and registered signatures to streamline troubleshooting. In IBM/velox, addressed a bug by ensuring the base Operator::initialize method is invoked in the Expand operator, which properly sets up the reclaimer, tracer, and initialization state for consistent operator behavior. Focused on data validation, logging, and debugging, these contributions improved observability and stability, reducing troubleshooting time and supporting more reliable downstream usage for both projects.