Full-stack development of a multi-tenant medical diagnostics and lab quality-assurance platform used across multiple user roles, including Database Admin, Registration Admin, CSR Admin, Dispatcher, Finance, and Lab/Participant. Built and maintained end-to-end features spanning backend and frontend — from Django REST Framework APIs and PostgreSQL database design to React/Redux (with Redux-Saga) interfaces for reporting, payments, dispatch tracking, and certificate management. Owned the full deployment pipeline on AWS, including EC2 server management and production releases, as well as day-to-day database administration. Worked independently across the stack, handling everything from feature architecture to live infrastructure, while maintaining strict data integrity and role-based access appropriate for a healthcare compliance platform.