Scaling a Fintech App to 30L+ Users

Problem

The application faced performance issues with slow load times (~7s), inefficient API handling, and inconsistent experience across key flows.

Scale & Context

• 30L+ users
• 10L+ daily active users
• High-frequency financial data

Challenges

• Handling large API payloads
• Reducing redundant network calls
• Maintaining performance across devices

Solution

• Implemented caching and lazy loading
• Optimized API request flow
• Improved UI rendering performance

Impact

• Load time reduced from ~7s → 0.5s
• Improved responsiveness
• Better user experience in critical flows