During October 2024, Danh Nguyen focused on stabilizing payment processing within the nashtech-garage/yas repository, addressing a critical issue in the order service’s payment status update flow. He resolved failures by correcting API endpoint paths and ensuring authentication headers were properly handled for payment capture requests. Working primarily with Java, Spring Boot, and API integration, Danh’s fix improved transaction state consistency between order and payment services. This backend enhancement led to more reliable checkout experiences, reduced payment capture failures, and more accurate revenue reporting. The work demonstrated a solid understanding of backend reliability and careful alignment with existing API contracts.