Sian developed the Customer Access Group (CAG) Ingestion feature for the Backbase/stream-services repository, focusing on enhancing access governance for legal entities and service agreements. She implemented configuration, service, and saga components using Java and Spring Boot, integrating the new CAG workflow into existing backend processes. Her work enabled automated creation and assignment of CAGs, reducing manual intervention and supporting scalable, policy-driven access management. By leveraging API integration and microservices architecture, Sian ensured the solution fit seamlessly within the platform’s existing structure. The depth of her contribution established a robust foundation for future enhancements in access control management.