Jimmy Qin focused on stabilizing and improving the build system for the intelligent-machine-learning/dlrover repository, addressing critical issues in Python environment consistency and version management. He enforced Python3 and pip3 usage throughout build scripts, ensuring reliable dependency installation and protocol buffer generation across diverse environments. Jimmy also refined version-check logic, removing redundant conditions to prevent edge-case failures in CI pipelines. In addition, he resolved a bug in PyTorch version comparison by parsing base version strings, which improved compatibility detection for downstream users. His work demonstrated depth in Python, build scripting, and testing, emphasizing stability and correctness over rapid feature delivery.