While developing FitAction, I focused on building a high-performance and scalable backend. Using Node.js, Express.js, and NestJS, I optimized API performance, reducing latency by 35% through query optimization and Redis caching.

Secure Authentication & Data Protection

Security was a top priority.

• Implemented JWT-based authentication with OAuth 2.0 and bcrypt, ensuring secure user sessions.
• Strengthened the system’s security posture, significantly reducing unauthorized access incidents.

Seamless Apple HealthKit Integration

To enhance user experience, I integrated Apple HealthKit for real-time synchronization of fitness metrics.

• Enabled personalized health insights, leading to a 40% increase in user engagement.
• Improved overall app experience by ensuring seamless data syncing.

Database Optimization for Performance Gains

Optimizing the database was crucial for performance improvements.

• Optimized MongoDB queries and incorporated Memcached.
• Reduced database response times by 50%, ensuring a more responsive system even under heavy loads.

Scalable Architecture & Real-Time Data Processing

I designed and developed the backend for FitAction, a comprehensive health and fitness platform.

• Integrated 12+ fitness modules (Yoga, HIIT, Nutrition, etc.) into a unified RESTful API.
• Developed a real-time calorie tracking system using MongoDB, designed to handle 1M+ daily transactions.
• Leveraged AWS auto-scaling for improved system reliability and scalability.

Tech Stack Used:

• Backend: Node.js, Express.js, NestJS
• Database: MongoDB, Redis, Memcached
• Authentication: OAuth 2.0, JWT, bcrypt
• Integrations: Apple HealthKit
• Infrastructure: AWS (Auto-scaling, Load Balancing)