Full stack healthcare platform enabling secure doctor appointment booking and real-time consultation with scalable backend architecture. • Built using Next.js, PostgreSQL, Prisma ORM with role-based workflows for Patient, Doctor, Admin • Implemented atomic database transactions ensuring consistency in payments and appointment scheduling • Integrated real-time video consultation using Vonage API with secure session management • Optimized performance achieving Lighthouse score 93.5 with fast load times (LCP 0.6s) Tech: Next.js, PostgreSQL, Prisma, REST APIs, Video API integration