On Real Battle, a Free Fire tournament platform, I engineered 80+ REST APIs for authentication, payments, and match management, with average response times under 200ms. I also implemented atomic wallet transactions and Razorpay payments with idempotency keys.
For StudyNotion, I developed a course-selling platform with an instructor dashboard and course builder, adding JWT authentication and Razorpay integration. I also created a responsive event management frontend with listing, filtering, and registration features.

