Ygu developed a configuration-driven enhancement for CORS exposed headers in the confluentinc/rest-utils repository, enabling backend services to specify which headers are accessible to cross-origin clients. By integrating the new access.control.expose.headers property directly into the CORS filter initialization, Ygu streamlined interoperability and reduced the need for manual code changes. The work included updating documentation to clarify default behaviors when the configuration is left blank, ensuring clear guidance for future maintainers. Using Java and leveraging skills in API configuration and backend development, Ygu delivered a focused, well-documented feature that addressed a specific interoperability challenge within a single, maintainable codebase.