In December 2025, Jose Luis Ortiz Tarin enhanced backend integration for the Arize-ai/phoenix repository by delivering an MCP endpoint improvement supporting the RunLLM client. He focused on stabilizing the endpoint’s functionality and ensuring compatibility with the client tool, addressing integration issues that previously caused runtime instability. Using JavaScript and leveraging his skills in API integration and full stack development, Jose Luis implemented explicit commit practices to improve traceability and future maintenance. While the work was limited to a single feature over one month, it demonstrated a targeted approach to backend reliability and maintainability within a complex production environment.