Worked on the apollographql/router repository to deliver a feature enabling per-stage coprocessor URL configuration, enhancing both configurability and deployment isolation for backend services. Developed a system in Rust that allows each processing stage—router, supergraph, execution, and subgraph—to specify its own coprocessor URL, overriding the previous global default. This approach supports routing requests to distinct coprocessor services at each stage, facilitating safer rollouts and improved environment separation for testing, staging, and production. Focused on backend development and configuration management, the work improved flexibility for API gateway integrations and allowed for more granular control over coprocessor service endpoints.