I need a complete sales platform—native on iOS and Android, mirrored by a responsive website—designed expressly for selling/displaying physical goods, services, real estate, etc. Shoppers should be able to browse an attractive product catalogue, keyword search suggestions, add items to a cart. Sellers should be able to display their items in an attractive catalogue, present the offered price, and pay securely (credit-card, Apple Pay, Google Pay, PayPal). Inventory, pricing, and promotions have to stay perfectly synced across all three fronts (apps + web), so a single backend with easy product and order management is essential. Because the launch window is close (8 weeks), the build needs to rely on proven frameworks and a clean, modular architecture that speeds up development and future updates. Smooth performance, push-notification support for item updates, and an intuitive checkout flow are key acceptance criteria. Deliverables • Production-ready iOS app (App Store submission files) • Production-ready Android app (Google Play submission files) • Fully responsive website with identical core features • Unified backend with admin dashboard, REST/GraphQL API, and database schema • Source code, brief technical documentation, and deployment walkthrough If you already have experience releasing high-quality e-commerce apps within similar timeframes, your approach suggestions and preferred tech stack will help me lock in the final plan quickly. The Design, Name, and Logo are ready and will be shared once we agree on a plan. Domains are already bought too. Once done, I kindly need all the app work and data handed over. This is to make sure future developers can continue the work too.