I’m building a mobile marketplace where wholesalers can quickly discover one another, list stock in real time, and close deals from their phones. The core flow is straightforward: a wholesaler signs up, photographs or imports inventory, sets quantities and pricing, and publishes the listing. Other businesses then search, filter, and message the seller directly to negotiate and place orders. Because the entire concept relies on speed and simplicity, the app must launch on both iOS and Android with a single codebase (React Native or Flutter are fine—use what lets us ship fastest). A lean but secure backend is necessary for user auth, product data, images, and chat; Firebase or a lightweight Node/Express stack with a managed database would suit the timeline. I need working builds, clean source code, and a short hand-off document as soon as humanly possible—think days, not weeks. If you already have marketplace modules or templates that can be adapted, that’s a huge plus.