Contributed to the Velox repository by delivering targeted improvements in test reliability and verification throughput. Developed per-query memory pool isolation to address flakiness in velox_local_runner_test, ensuring that concurrent tests no longer interfere through shared resources. Enhanced the WindowFuzzer by constraining test generation and refining IPPrefixType handling, which reduced invalid test cases and prevented compilation errors. These changes, implemented in C++ with a focus on memory management, fuzzing, and type system expertise, resulted in more stable continuous integration runs and faster developer feedback. The work demonstrated a methodical approach to hardening test infrastructure and improving overall code quality.