Built Auclux, a multi-platform live auction ecosystem with a Flutter mobile app, React web platform, and admin dashboard, backed by a Node.js/Express API and real-time auction infrastructure. The platform supports live penny and market auctions, real-time bidding via WebSockets, wallet and payment flows, watchlists, winner tracking, referrals, push notifications, and identity verification. I also worked on the admin panel for managing users, auctions, categories, banners, promo codes, bidding packs, winners, and content pages, creating a complete end-to-end auction solution for both customers and internal operations.