Gautier Esam developed a regional routing capability for the Discovery Engine in the google/adk-python repository, enabling API requests to be directed to the nearest regional endpoint. This enhancement improved latency, flexibility, and data locality for multi-region deployments. Gautier addressed edge cases by implementing and merging a tooling fix, ensuring robust support for regional endpoints and closing a related issue. The work involved close cross-team collaboration and emphasized code quality through thorough validation of routing logic and end-to-end request handling. Utilizing Python for backend and API development, Gautier also applied unit testing to ensure reliable performance and maintainability of the new feature.