Marrow / DailyRounds

About the Product

DailyRounds / Marrow is India's most popular NEET PG (postgraduate medical entrance exam) preparation platform. Built by Neuroglia Health, the platform serves hundreds of thousands of medical students across India preparing for postgraduate medical specialization exams.

The platform offers video lectures, question banks, mock tests, performance analytics, and curated study material — all accessible via web and mobile. Marrow is known for its high-quality content and gamified learning approach that drives consistent student engagement.

My Role

Joined Neuroglia Health as a Software Engineer (Jan 2020 – Oct 2020) to contribute to backend API development and frontend features. The role required handling a large concurrent user base — especially during peak exam preparation seasons.

Key Contributions

• Developed REST APIs for educational content management (lectures, questions, topics)
• Built React-based frontend components for student-facing content browsing
• Handled session management and authentication for a large, concurrent user base
• Worked primarily with MongoDB for flexible content storage (varying question types)
• Wrote unit tests using Pytest to maintain code quality across API endpoints
• Contributed to performance improvements for high-traffic endpoints during exam seasons

Technical Highlights

MongoDB was the database of choice — its flexible document model was well-suited for storing diverse question types (MCQ, image-based, clinical vignettes) with varying metadata structures. The React frontend needed to handle rich media content (video embeds, image questions) while maintaining fast load times for students on mobile data.

Session management for a large user base required careful attention to token handling, rate limiting, and session invalidation — especially important for a platform where exam integrity and user account security matter.

Scale

• Hundreds of thousands of registered medical students across India
• High traffic spikes during NEET PG exam season requiring robust infrastructure
• Content library spanning thousands of video lectures and question bank items