Worked on backend development for the open-feature/flagd repository, focusing on improving cross-origin resource sharing (CORS) for the OFREP service. Addressed a persistent preflight issue by adopting shared CORS middleware, replacing inline configuration to ensure consistency with the Connect service. This update allowed the Flagd-Selector header in preflight responses, enabling smoother browser-based integrations and reducing friction between services. Utilized Go for API development and CORS configuration, ensuring that AllowedHeaders were properly set to support frontend reliability in multi-service environments. The work closed a related issue and eliminated CORS drift, enhancing interoperability across the platform’s backend services.