I’m launching a greenhouse-industry marketplace whose sole purpose is to connect buyers and sellers of equipment, supplies, and services. The build covers three fronts—responsive web, Android, and iOS—served by one shared back-end so inventory and user data stay perfectly in sync no matter where someone signs in. Core scope The platform needs secure user accounts with straightforward sign-up, social or email log-in, and a clean profile area for managing listings and favourites. A searchable product catalog sits at the heart of the experience, letting growers filter by category, region, and price while browsing photos, specs, and availability in real time. Although payment processing isn’t in the first release, the architecture should leave a clear path for adding it later without major re-work. Tech freedom Any modern full-stack framework is welcome—whether that’s React + Node, Next.js, Laravel, or an equivalent—so long as the final codebase is well-documented and the API is consumable by the native mobile apps. Efficiency, clean schema design, and test coverage carry more weight than specific tool choices. Deliverables • Responsive web application with production-ready deployment • Native Android and iOS apps built from the same API • Modular authentication system (JWT or similar) with role management • Product catalog module with advanced search and pagination • Database schema, seed data, and concise setup docs • Short hand-over session to walk through repo structure and future payment-gateway hooks Acceptance A demo on staging showing user sign-up, profile edit, catalog browse/search, and seamless data parity across web, Android, and iOS constitutes completion.