I need a technically sound partner to bring ResellStudio to life—a cloud-based SaaS for online resellers that automates listing, cross-listing, repricing, and analytics through AI-driven workflows. The first release must be robust enough to handle roughly 1,000 concurrent users and leave room for a future mobile app. Core scope • Integrate listing, cross-listing, and automated repricing across eBay, Shopify, Depop, Vinted, Grailed, Etsy, Whatnot, and Tilt. • Design a multi-tenant architecture (Docker/Kubernetes or equivalent) that scales horizontally and meets common security benchmarks (OWASP, GDPR readiness, SSL/TLS everywhere). • Build clean, responsive screens—React, Vue, or similar—backed by a REST/GraphQL API. • Embed basic AI models or 3rd-party services to suggest titles, prices, and category mappings. • Include a Stripe-based subscription/payment module, role-based access, and an admin dashboard. • Provide CI/CD scripts, unit tests, and developer-grade documentation so future teams can add features or create the mobile companion app. Deliverables for this engagement 1. Technical architecture diagram with technology stack choices and scaling plan. 2. Functional prototype that demonstrates the full listing flow—including account connection, product sync, price rules, and analytics snapshot—across at least eBay and Shopify, with stubs in place for the other marketplaces. 3. Clean UI components, login, billing, and admin pages. 4. Deployment scripts and a short screencast walkthrough of the running system. If you have proven experience shipping SaaS products, integrating multiple e-commerce APIs, and can work within these parameters, let’s discuss timelines and milestones.