Built a full-stack Instagram-style web application with secure user authentication, photo uploads, and real-time social interactions (likes & comments). Optimized backend with MongoDB query tuning, RESTful API structuring, and pagination, reducing latency by 40%. Improved frontend load times by 30% through code-splitting, lazy loading, and efficient state management. Integrated Cloudinary for secure media storage, cutting server load by 25%. Successfully deployed on cloud platforms (Render/Vercel) for public access and live demo.