During February 2025, So Qian focused on backend development within the IBM/unitxt repository, addressing a critical bug in the WML Inference Engine. Using Python, So Qian engineered a fix to ensure that when only a Space ID is provided, credentials are correctly assigned, thereby preventing authentication and authorization errors that previously disrupted WML workflows. This targeted solution improved the reliability of credential handling for production environments, reducing downstream errors and supporting stable workflow execution. The work demonstrated a strong grasp of backend systems and authentication logic, though the scope was limited to a single, high-impact bug fix rather than feature development.