Multi-Vendor E-Commerce Platform

### Project Overview This project involved building a robust **Multi-Vendor E-Commerce Platform** for a fashion retail startup. The platform functions similarly to Amazon or Etsy, allowing independent vendors to manage their own stores, inventory, and shipping while providing customers with a unified shopping experience. ### Problem Statement The startup needed a highly scalable solution that could handle high traffic spikes during sales events, manage complex commission structures for vendors, and ensure secure payments. Off-the-shelf solutions were too rigid and couldn't support the custom vendor workflows required. ### Solution Provided We architected a headless commerce solution using Next.js for the frontend and a custom Node.js backend. We implemented a sophisticated vendor dashboard for inventory management and sales tracking. For payments, we integrated Stripe Connect to automatically split payments between vendors and the platform admin. ### Technologies Used * **Frontend:** Next.js, TypeScript, Tailwind CSS * **Backend:** Node.js, NestJS, GraphQL * **Database:** PostgreSQL, ElasticSearch * **Cloud:** AWS (Elastic Beanstalk, CloudFront) * **Payments:** Stripe Connect ### Key Features * **Vendor Dashboard:** Comprehensive tools for product listing, order management, and analytics. * **Unified Checkout:** Customers can buy from multiple vendors in a single transaction. * **ElasticSearch Implementation:** Blazing fast search and filtering for thousands of products. * **Automated Payouts:** Real-time commission calculation and transfers via Stripe Connect. * **Real-time Inventory Sync:** Prevents overselling with WebSocket-based inventory updates. ### Business Impact * **Onboarded 1,000+ vendors** within the first 6 months. * **Processed $5M+ in Gross Merchandise Value (GMV)** in the first year. * **Achieved 99.99% uptime** during Black Friday traffic spikes. ### Team Size 10 Members ### Role Breakdown * **Project Manager:** Managed the agile sprint cycles and feature prioritization. * **Lead Developer:** Architected the headless commerce setup and database schema. * **Frontend Developers (2):** Built the customer-facing storefront and vendor portal. * **Backend Developers (2):** Developed the GraphQL APIs and payment integrations. * **UI/UX Designer:** Designed a high-converting, mobile-first shopping interface. * **QA Engineer:** Performed automated regression testing and payment flow verification.