Worked on stabilizing Java runtime environments by addressing critical bugs in test automation and garbage collection. In TencentKona-11, improved CI reliability by modifying the test runner configuration to prevent timeouts in JstackTestStoppedThread, using Java and deep knowledge of JVM internals to enhance feedback loops and reduce triage time. In SAP/SapMachine, fixed a boundary calculation issue in G1 GC’s UseCompressedOops feature, ensuring correct memory management across diverse heap configurations. Added automated regression testing to verify correctness, leveraging expertise in garbage collection, performance tuning, and software testing. Work focused on maintainability and reliability across complex Java and C++ codebases.