I intend to launch a full-scale online shopping mall that serves customers across Switzerland and lets multiple merchants run their own storefronts from a single platform. A dedicated seller area is essential: each vendor must be able to register, upload products, track inventory, process orders, handle returns and view sales analytics without my intervention. The site has to match—or surpass—a well-established competitor, so speed, stability and an effortless checkout flow are non-negotiable. I am leaning toward a modern tech stack (Laravel, Symfony, Django, or a comparable framework paired with React/Vue) but remain open if you can justify an alternative that scales cleanly and supports multilingual content (DE/FR/IT/EN). Key expectations • Marketplace core with customer-facing catalog and a full seller dashboard • Swiss-compliant payment integration (PostFinance, Twint, credit cards, Apple/Google Pay) • Tax, VAT and shipping logic suited to domestic and cross-border orders • Responsive design optimised for mobile and desktop • Clean codebase, documented APIs and hand-over instructions I’ll likely add advanced search, user reviews and loyalty features during the build, so structure the code in a way that new modules plug in smoothly. Acceptance criteria 1. A staging URL demonstrating the full buyer journey—from browsing to confirmed purchase—using sandbox payments. 2. Seller account proving end-to-end product management and order fulfilment. 3. Repository access and deploy script enabling a straightforward hand-off to my Swiss hosting. If you specialise in scalable marketplaces and can propose a clear roadmap with milestones, message me with a concise outline of your approach and the core tools you plan to use.