Worked on TencentKona-8 and TencentKona-11 repositories, focusing on stability and diagnostics in Java-based concurrent systems. Addressed flaky test failures by enhancing JmapHeapTest to skip execution when ptrace is unavailable, improving test reliability and clarity in CI environments. In TencentKona-11, implemented enhanced deadlock detection by introducing warning logs when a synchronizer’s owning thread is terminated unexpectedly, along with a dedicated test to validate these diagnostics. Leveraged Java, C++, and expertise in concurrency, JVM internals, and testing to increase system observability and reduce triage time, ultimately strengthening automated validation and deadlock prevention in production environments.