During February 2025, So Qian focused on backend development in Python, addressing a critical authentication issue in the IBM/unitxt repository. They delivered a targeted bug fix for the WML Inference Engine, ensuring that credentials are correctly assigned when only a Space ID is provided. By analyzing the credential assignment logic, So Qian modified the backend to prevent mis-binding and downstream authentication or authorization errors in WML workflows. This work improved the reliability of credential handling for production environments. Although the period did not include new feature development, the depth of the fix demonstrated strong problem-solving and backend engineering skills in Python.