Responsible for consulting, architecture, and solution design for a supplier portal built on SAP CAP and UI5, integrated with existing third-party APIs. Designed following a microservices approach, the portal ensures scalability and flexibility. A key feature was the automated user onboarding process, triggered by the creation of a new SAP Ariba contract, leveraging Ariba APIs and the Identity Authentication Service (iAS) API for seamless user invitation and management. The project was implemented in close collaboration with the customer and external development teams.