QuickCity_Cart is a full-stack multi-vendor e-commerce marketplace developed to connect local sellers with buyers through a unified digital platform, enabling small and medium businesses to establish an online presence and streamline their operations. The system provides dedicated vendor dashboards for managing products, inventory, and orders, while customers experience seamless shopping with real-time cart updates, product filtering, and order tracking. Built using the MERN stack (MongoDB, Express.js, React.js, Node.js), the application ensures scalability, flexibility, and high performance. It incorporates secure authentication using Firebase with role-based access control, integrates Razorpay for reliable online payments, and utilizes Cloudinary for efficient media storage and fast content delivery. The platform features a responsive and user-friendly interface compatible with desktop and mobile devices, along with a modular and RESTful architecture for easy maintenance and future enhancements. Overall, QuickCity_Cart supports digital transformation by bridging the gap between local vendors and modern consumers, making it a practical and scalable solution for real-world e-commerce deployment.

Keywords: Multi-Vendor E-Commerce, MERN Stack, Digital Marketplace, Firebase Authentication, Razorpay Integration, Cloudinary, Scalable Architecture, Responsive Design, Local Business Empowerment, Real-Time Systems