React E-Commerce Website Development

I’m building a full-featured e-commerce site and need a developer (or small team) who is fluent with the MERN stack—React.js on the front end, Node.js with Express.js on the back end, and MongoDB as the database.

Core scope
The store must be fast, cleanly coded, and fully responsive on mobile, tablet, and desktop. Beyond a polished UI, I’ll need secure user authentication, seamless MongoDB integration, and a checkout flow that uses PayU Money as the payment gateway.

Key shopping features
• Advanced product search and filtering so visitors can drill down quickly.
• A reliable shopping cart and checkout process with real-time price and inventory updates.
• User reviews and ratings attached to each product for social proof.

What I’d like from you
1. A brief note on your approach to structuring a scalable MERN application.
2. Links to a few live projects—ideally e-commerce—built with React, Node/Express, and MongoDB.
3. Your estimated timeline and total cost, broken down by major milestones (design, core build, QA, deployment).

I’m ready to move quickly once I see a strong match, so please include any clarifying questions in your proposal.