Rukayat Mustapha developed and maintained features for the companieshouse/confirmation-statement-web and confirmation-statement-api repositories, focusing on dynamic fee management and pricing alignment. She implemented environment-driven configuration using Node.js and Express.js, enabling the confirmation statement fee to be updated via environment variables and reflected consistently across web and API layers. In Java, she updated unit tests to match the revised CostService fee structure, ensuring accurate pricing calculations and reducing production risk. Her work emphasized robust environment configuration, full stack development, and test-driven change management, supporting faster policy deployment and minimizing discrepancies in customer-facing charges through careful cross-repository coordination.