I need an end-to-end build of a minimalist yet feature-rich marketplace that supports three distinct product categories—physical goods (our design priority), digital downloads, and auction items—while catering to three membership tiers: Client, Seller, and Corporate. The entire experience must feel engaging and interactive; every screen should invite exploration, conversation, and repeat visits. Core platform goals • Clean, distraction-free UI that still delivers rich micro-interactions, subtle animations, and clear calls-to-action. • Automated onboarding and role-based dashboards for each membership tier, including KYC where relevant. • Robust catalog management for all product types plus timed auction logic, digital-file delivery, and real-time stock control for physical goods. Essential community & support features • User reviews and ratings attached to products, sellers, and transactions. • Live chat support visible across key touch-points, with escalation paths for corporate members. • Discussion forums so members can share purchasing tips, unboxings, and troubleshooting advice. Thread moderation controls are a must. Transactional backbone – Secure checkout that can mix physical, digital, and auction wins in one cart. – Multiple payment gateways, split payouts, tax/VAT handling, and auto-generated invoices. – Shipment tracking integrations for physical orders and instant file access for digital ones. Admin & analytics layer • Comprehensive reporting on sales, auctions, community engagement, and membership growth. • Granular permission settings so my team can manage content, resolve disputes, and highlight featured listings. Scope & deliverables 1. Detailed technical blueprint, wireframes, and UI prototypes. 2. Full-stack development, including mobile-responsive front-end and scalable back-end (your recommended stack). 3. QA, security hardening, and performance tuning. 4. Deployment to my hosting environment plus a hand-off package: source code, architecture docs, and a concise video walkthrough. 5. Thirty-day post-launch support for bug fixes and minor adjustments. If you have demonstrable experience building marketplaces with lively user communities, I’m ready to review your approach, timeline, and technology choices.