Full-Stack Web Developer for Live Bidding & E-Commerce Platform "Selus."

We are seeking an experienced full-stack web developer (or small agency) to architect and develop "Selus"—a scalable, high-performance e-commerce platform integrated with a real-time bidding/auction engine. Key Functional Requirements User Roles & Security: Role-based access control (Admin, Seller/Vendor, Buyer) with secure authentication and profile verification. Real-Time Bidding Engine: Live auction module featuring dynamic countdown timers, auto-bidding logic, reserve prices, and instantaneous WebSockets-driven bid updates. E-Commerce Core: Product management, catalog filtering, shopping cart, order processing, and transactional workflows. Payments & Notifications: Integrated secure payment gateways for winning bids and standard purchases, accompanied by automated email/in-app alert triggers. Dashboards: Comprehensive admin and vendor analytics panels for live tracking of auctions, sales reports, and user activities. Preferred Technical Capabilities Frontend: React.js / Next.js / Vue.js / Tailwind CSS Backend: Node.js (NestJS / Express) or Python (Django / FastAPI) Database & Real-time: PostgreSQL / MySQL / MongoDB with WebSockets (Socket.io / Firebase)