Worked on backend development for the bytedance/deer-flow repository, focusing on improving data integrity within the tool call processing pipeline. Addressed a critical bug by preventing duplicate assignments to the tool_call_chunks field, which previously risked data corruption and inconsistent downstream behavior. Utilized Python to implement a targeted fix that ensures accurate handling of tool invocation data, supporting the reliability and quality of service for dependent systems. The work emphasized careful bug analysis and resolution, contributing to more robust backend operations. Demonstrated skills in backend development and bug fixing, with a focus on maintaining data consistency and reducing potential processing errors.