Convert MVP to E-Commerce App -- 2

I already have a stripped-down MVP that proves the concept; now I need it turned into a fully-functioning web e-commerce application. The build will run exclusively in the browser, so every decision—from database design to responsive front-end rendering—should focus on delivering a smooth web experience.

Core scope
• A robust product catalog that lets me add, edit and retire items without touching code.
• End-to-end payment gateway integration (Stripe is my preferred choice, but I’m open if you can justify another).
• A bidirectional price negotiator module where buyers and sellers can counter-offer in real time; the logic is drafted in the MVP but needs production-grade refinement and security hardening.

Beyond the features, I expect clean, well-documented code, standard unit and integration tests, and a deployment pipeline (CI/CD) that can push to my hosting provider with one command. Performance, accessibility and SEO best practices matter because the store must feel snappy and rank well from day one.

Acceptance criteria
• All core features work across modern desktop and mobile browsers.
• Payments complete successfully in test and live modes.
• Negotiator updates instantly for both parties without page refresh.
• Lighthouse performance score ≥ 90 on first contentful paint.

If you’re comfortable owning both front-end and back-end pieces—whether that’s React + Node, Vue + Laravel, or another comparable stack—let’s talk. I’ll share the current repo and a short loom walkthrough so you can estimate the effort and outline milestones.