Worked on stabilizing chat functionality within the vllm-project/aibrix repository by addressing critical import errors in the chat application routers. Focused on backend development using Python and FastAPI, the developer identified and resolved missing httpx imports that had disrupted end-to-end messaging flow. This targeted bug fix restored reliable chat operations, reducing downtime and minimizing user impact. The approach involved careful debugging and cross-file code changes, ensuring adherence to established code standards. By enhancing the reliability of customer-facing chat features, the work contributed to improved business value and reduced potential support overhead, demonstrating strong skills in API development and backend maintenance.