Worked on the pipecat-ai/pipecat repository to deliver a configurable base URL feature for Twilio’s auto hang-up functionality, enabling integration with Twilio-API-compatible backends and supporting self-hosted deployments. Refactored URL construction logic into a dedicated helper function and ensured backward compatibility to prevent disruptions for existing users. Employed Python for backend development, focusing on serializer customization and robust URL construction utilities. Adopted a test-driven approach by implementing comprehensive unit tests that validated default, region-specific, and override scenarios. This work expanded deployment flexibility, reduced vendor lock-in, and improved maintainability of call-resource endpoints without introducing breaking changes or regressions.