Marketplace Web UI Architect

Marketplace name: SupplyBridge Marketplace type: B2B supplier and wholesale product marketplace Primary buyers: Independent retailers E-commerce brands Hospitality businesses Procurement teams Regional distributors Primary sellers: Manufacturers Wholesalers Importers Approved distributors Private-label suppliers Guest capabilities: Browse categories Search listings View product pages View supplier profiles Compare products Save temporary selections Authentication required before sending a quote request or messaging a supplier Admin or operator roles: Marketplace Administrator Supplier Verification Reviewer Listing Moderator Dispute Reviewer Finance Operator Support Agent Primary buyer job: Find suitable suppliers, compare minimum orders, evaluate lead times and verified qualifications, and request quotes. Primary seller job: Create a trusted supplier profile, publish complete wholesale listings, respond to quote requests, manage availability, and track buyer inquiries. Transaction model: Request for quotation Direct inquiry Approved instant purchase for selected listings Hybrid Revenue model: Supplier subscription Verified commission on supported transactions Promoted listings Exact fees require verification Core entities: Buyer Supplier Supplier Team Member Category Product Listing Quote Request Quote Message Order Invoice Review Verification Record Certification Saved List Comparison Set Dispute Payout Categories: Food and Beverage Home and Furniture Beauty and Personal Care Apparel Packaging Hospitality Supplies Electronics Industrial Supplies Listing types: Wholesale Product Made-to-Order Product Private-Label Product Custom Product Instant-Purchase Product Quote-Only Product Price models: Per unit Per case Per pallet Starting at Price range Custom quote Volume tiers Exact pricing requires verification Availability model: In stock Made to order Supplier confirmation required Lead time Minimum production quantity Exact availability requires verification Fulfillment model: Supplier fulfilled Freight Parcel delivery Buyer-arranged shipping Pickup Exact responsibility requires verification Payment model: Off-platform invoice for quote-based orders Marketplace payment for supported direct purchases Exact behavior requires verification Payout model: Applicable only to marketplace-processed transactions Exact payout schedule and reserves require verification Review model: Verified transaction review where supported Buyer rates product quality, communication, accuracy, and fulfillment Exact eligibility and moderation require verification Trust model: Supplier identity verification Business verification Approved certification review Verified transaction reviews Marketplace reporting Dispute support All claims require verification Seller verification: Business documents Identity of authorized representative Bank or payout information where applicable Certification evidence Exact requirements and review process require verification Dispute or cancellation model: Depends on transaction type Marketplace-processed orders may support disputes Off-platform quote transactions have different responsibilities Exact policies require verification Search requirements: Search products Suppliers Categories Brands Materials Exact supplier identifiers Filter requirements: Category Location Minimum order Lead time Price basis Supplier type Verification status Certification Private-label support Customization Shipping region Rating Review count Comparison requirements: Compare products within the same category Show price basis Minimum order Lead time Supplier Location Verification Certifications Customization Shipping Policies Saved-item requirements: Project-based procurement lists Preserve supplier, listing, selected quantity, and note Support sharing with approved buyer-team members Messaging requirements: Buyer and supplier threads Listing context Quote context Attachments System messages Reporting No private contact details before approved stage unless permitted Seller onboarding: Account Business type Business verification Supplier profile Shipping regions Capabilities Certifications First product listing Review Approval Listing creation: Category Title Media Description Specifications Materials Minimum order Price model Lead time Customization Availability Shipping Policies Preview Moderation Seller dashboard: Quote requests Messages Listings Availability Orders Reviews Subscription Promoted listings Analytics Verification tasks Frontend stack: Next.js React TypeScript Tailwind CSS Radix UI Algolia-style search service Stripe-style marketplace payments for supported transactions Design system: Custom B2B design system using shadcn/ui and Storybook Responsive targets: Wide desktop Desktop Laptop Tablet Mobile for buyer discovery and urgent seller tasks Accessibility target: WCAG 2.2 AA implementation review Localization: English initially Spanish, German, French, and Portuguese planned Multi-currency display planned Allow at least 35% text expansion Analytics: Search submitted Filter applied Listing viewed Supplier profile viewed Listing saved Comparison started Quote request started Quote request submitted Supplier response Seller onboarding started First listing submitted Listing published Need output: Complete marketplace architecture Role model Homepage Taxonomy Search Autocomplete Filters Sorting Product and supplier cards Listing pages Supplier profiles Ratings and reviews Saved procurement lists Comparison Messaging Quote flow Direct-purchase checkout Seller onboarding Listing creation Seller dashboard Order states Payout states Trust and safety Moderation Responsive behavior Accessibility Analytics Experiment roadmap Developer handoff Acceptance criteria Regression tests QA checklist Risk assessment Need variations: Search-First B2B Marketplace Supplier-Trust Marketplace Procurement-Workflow Marketplace Special constraints: Do not invent supplier verification. Do not invent certification validity. Do not invent prices, fees, lead times, inventory, shipping, or payout dates. Clearly distinguish marketplace-processed and off-platform transactions. Do not label promoted listings as organic results. Preserve search and filter state. Do not expose private buyer or supplier documents.

=== MARKETPLACE WEB UI ARCHITECTURE === Marketplace: SupplyBridge Marketplace Type: B2B supplier and wholesale product marketplace Primary Buyer Conversion: Submit a qualified request for quotation. Primary Seller Conversion: Complete verification and publish the first approved wholesale listing. === EXECUTIVE SUMMARY === SupplyBridge should be designed as a search-first B2B marketplace with strong supplier context, structured wholesale attributes, transparent transaction types, and persistent procurement workflows. The primary buyer experience should help procurement teams: 1. Search products and suppliers. 2. Filter by minimum order, lead time, location, and verified capabilities. 3. Compare compatible listings. 4. Review supplier profiles. 5. Save products to procurement lists. 6. Submit structured quote requests. 7. Manage supplier responses. The primary seller experience should help suppliers: 1. Complete progressive verification. 2. Create a supplier profile. 3. Publish complete wholesale listings. 4. Respond to quote requests. 5. Manage availability and lead-time information. 6. Track messages, orders, reviews, and account tasks. === ROLE ARCHITECTURE === Guest: - Search - Filter - View products - View supplier profiles - Compare products - Save temporary selections Buyer: - Create procurement lists - Share approved lists - Request quotes - Message suppliers - Review quotes - Complete supported purchases - Review verified transactions Supplier: - Manage supplier profile - Complete verification - Create listings - Manage availability - Respond to quotes - Message buyers - Manage supported orders - Review account analytics Operator Dependencies: - Supplier verification - Listing moderation - Certification review - Dispute review - Finance operations - Support === INFORMATION ARCHITECTURE === Buyer Navigation: - Home - Categories - Search - Suppliers - Saved Lists - Comparisons - Quote Requests - Messages - Orders - Account Supplier Navigation: - Overview - Quote Requests - Listings - Availability - Orders - Messages - Reviews - Analytics - Verification - Subscription - Settings === HOMEPAGE === Hero Heading: Find Wholesale Products and Qualified Suppliers Hero Search: Search products, suppliers, materials, or categories Primary CTA: Search Marketplace Secondary Seller CTA: Sell on SupplyBridge Primary Sections: 1. Search and category discovery 2. Popular wholesale categories 3. Featured verified suppliers, when verified 4. How quote requests work 5. Buyer trust and transaction explanation 6. Seller onboarding value 7. Recently viewed or saved items for returning users 8. FAQ === TAXONOMY === Category: Packaging Children: - Food Packaging - Cosmetic Packaging - Shipping Boxes - Glass Containers - Flexible Packaging Required Attributes: - Material - Unit - Minimum Order - Customization - Lead Time - Shipping Regions Optional Attributes: - Certification - Recycled Content - Printing Options - Sample Availability Governance: Category and attribute changes require approved operational ownership. === SEARCH ARCHITECTURE === Searchable Entities: - Products - Suppliers - Categories - Brands - Materials - Exact Identifiers Autocomplete Groups: - Categories - Products - Suppliers - Recent Searches Every suggestion displays: - Entity type - Label - Supporting context - Match reason Search Results: Use separate tabs or clearly labeled groups for Products and Suppliers. Do not mix supplier profiles and product listings without entity labels. === FILTER SYSTEM === Primary Filters: - Category - Supplier Location - Minimum Order - Lead Time - Price Basis - Supplier Type - Verification - Certification - Private-Label Support - Customization - Shipping Region - Rating - Review Count Mobile Pattern: Full-screen filter view. Mobile Actions: - Clear All - Show Verified Result Count Requirements: - Preserve selections. - Display applied-filter chips. - Maintain URL state. - Restore focus after closing. - Retain filters after visiting a listing. === SORTING === Options: - Most Relevant - Minimum Order: Low to High - Lead Time: Shortest First - Highest Rated - Most Reviewed - Newest Listings Most Relevant requires a documented ranking model. === PRODUCT CARD === Include: - Product image - Product title - Supplier name - Supplier location - Price basis - Minimum order - Lead time - Verification state - Rating and review count - Private-label availability - Save action - Compare action - Promoted label when applicable Avoid: - Unverified scarcity - Hidden minimum orders - Price without unit - Verification badges without definitions === SUPPLIER CARD === Include: - Supplier name - Logo - Primary categories - Location - Verified state - Rating - Review count - Minimum-order context - Private-label support - Approved certifications - View Supplier CTA === LISTING PAGE === Recommended Order: 1. Product title 2. Supplier identity 3. Media 4. Price basis 5. Minimum order 6. Lead time 7. Availability 8. Customization options 9. Primary CTA 10. Shipping regions 11. Specifications 12. Certifications 13. Policies 14. Reviews 15. Supplier profile 16. Related listings Primary CTA: Request a Quote Secondary Actions: - Save to Procurement List - Add to Comparison - Message Supplier === PRICE COMMUNICATION === Display: - Verified currency - Price unit - Minimum order - Volume-tier context - Additional fees where verified - Custom-quote status Examples: €4.20 per unit Minimum order: 500 units or: Custom Quote Minimum order: 2 pallets Do not show an unsupported fixed price for quote-only listings. === SUPPLIER PROFILE === Sections: - Overview - Product Catalog - Capabilities - Locations - Shipping Regions - Customization - Approved Certifications - Ratings and Reviews - Policies - Contact or Quote CTA Trust: Each verification and certification label should link to an explanation of what was verified and what was not. === REVIEW SYSTEM === Display: - Average rating - Review count - Rating distribution - Verified-transaction status - Product category - Review date - Supplier response - Rating dimensions Possible Dimensions: - Product Accuracy - Product Quality - Communication - Fulfillment All dimensions require policy approval. === SAVED PROCUREMENT LISTS === A saved item preserves: - Listing - Supplier - Selected quantity - Price context - Availability state - Buyer note - Date saved List Actions: - Rename - Share with approved team members - Add to Comparison - Request Quotes - Remove - Export where authorized Changed State: The price, minimum order, or availability has changed since this item was saved. === COMPARISON === Eligibility: Only products in compatible categories and price models. Dimensions: - Supplier - Location - Price Basis - Minimum Order - Lead Time - Verification - Certifications - Customization - Shipping - Reviews - Policies Mobile: Use a selected-product switcher and grouped comparison dimensions. === QUOTE REQUEST FLOW === Step 1: Buyer Requirement Fields: - Product - Quantity - Specifications - Customization Step 2: Delivery Context Fields: - Delivery Country or Region - Target Date - Shipping Preference Step 3: Supporting Information Fields: - Attachments - Optional Message - Preferred Response Step 4: Review and Submit Final CTA: Send Quote Request Requirements: - Preserve drafts. - Explain which suppliers receive the request. - Avoid requesting unnecessary sensitive information. - Show verified response expectations only. - Distinguish submitted from viewed or responded. === QUOTE STATES === - Draft - Submitted - Viewed, when supported - Clarification Requested - Supplier Responded - Accepted - Declined - Expired - Withdrawn Do not invent view or delivery status. === SELLER ONBOARDING === Step 1: Create Supplier Account Step 2: Choose Supplier Type Step 3: Business Verification Step 4: Create Supplier Profile Step 5: Add Capabilities and Shipping Regions Step 6: Add Approved Certifications Step 7: Create First Listing Step 8: Review and Submit States: - In Progress - Verification Pending - Action Required - Approved - Rejected - Suspended === LISTING CREATION === Sections: - Category - Product Title - Media - Description - Specifications - Materials - Price Model - Minimum Order - Lead Time - Customization - Availability - Shipping - Policies - Preview Requirements: - Category determines required attributes. - Drafts are preserved. - Missing information is identified. - Sellers can preview product cards and listing pages. - Moderation states remain distinct from technical errors. === SELLER DASHBOARD === Priority Modules: - New Quote Requests - Buyer Messages - Listings Requiring Attention - Verification Tasks - Availability Alerts - Supported Orders - Payout Issues - Review Responses Avoid decorative metrics that do not support seller action. === TRUST AND SAFETY === Buyer Trust: - Verified supplier states - Approved certification states - Transparent fees - Structured reviews - Secure messaging - Reporting - Dispute guidance Seller Trust: - Buyer-account state - Quote context - Payment status for supported transactions - Cancellation guidance - Payout clarity - Reporting Do not imply marketplace protection for off-platform transactions unless verified. === RESPONSIVE ARCHITECTURE === Desktop: - Sidebar filters - Multi-column result grids - Full comparison - Rich supplier dashboards Tablet: - Collapsed navigation - Filter drawer - Reduced card density - Simplified comparison Mobile: - Persistent search access - Full-screen filters - Decision-focused product cards - Reachable Quote CTA - Visible supplier context - Sequential comparison - Keyboard-safe messaging - Urgent seller tasks - No page-level horizontal scrolling === ACCESSIBILITY REQUIREMENTS === - Semantic search - Accessible autocomplete - Labeled filters - Dynamic-result announcements - Clear product-card links - Alternative text - Rating semantics - Price and unit clarity - Verification text - Keyboard navigation - Visible focus - Dialog and drawer focus management - Accessible comparison - Mobile keyboard support - Zoom and reflow - Non-color status communication - Carousel alternatives - Touch-target review === ANALYTICS EVENT MAP === Event: search_submitted Properties: - query_category - entity_scope - device_type Do Not Include: Raw sensitive queries Event: filter_applied Properties: - filter_id - selected_count - result_count_bucket Event: listing_viewed Properties: - category_id - listing_type - supplier_verification_state - source Event: quote_request_started Properties: - category_id - source - device_type Event: quote_request_submitted Properties: - category_id - quantity_bucket - attachment_present - device_type Event: seller_onboarding_completed Properties: - seller_type - verification_path - device_type Privacy: Do not include buyer messages, supplier documents, addresses, payment details, quote attachments, certification files, or private business information. === EXPERIMENT ROADMAP === Experiment 1: Search-First Homepage Hypothesis: Prominent product and supplier search will improve qualified marketplace discovery compared with a category-first homepage. Primary Metric: Search-to-qualified-listing-view rate Experiment 2: Supplier Context on Product Cards Hypothesis: Showing supplier identity, location, and verified state on cards will improve qualified listing engagement. Primary Metric: Listing-to-quote-start rate Guardrail: Supplier-profile abandonment Experiment 3: Quote-Request Progress Hypothesis: A four-step structured quote flow will improve qualified completion compared with one long form. Primary Metric: Qualified quote-request completion Guardrails: Submission quality Completion time Experiment 4: Saved Procurement Lists Hypothesis: Project-based saved lists will increase return use and multi-item quote activity. Primary Metric: Saved-list-to-quote-request rate === DEVELOPER HANDOFF === Required Components: - MarketplaceHeader - GlobalSearch - SearchAutocomplete - CategoryNavigation - FilterView - AppliedFilterChip - SortControl - ProductCard - SupplierCard - ListingGallery - PriceDisplay - VerificationBadge - RatingSummary - SupplierProfileHeader - SavedList - ComparisonView - MessagingThread - QuoteRequestForm - SellerOnboarding - ListingEditor - ListingPreview - SellerDashboard - OrderStatus - PayoutStatus - ModerationState Required Data Models: - Buyer - Supplier - SupplierMember - Category - Listing - Attribute - Price - Availability - Verification - Certification - Review - SavedList - Comparison - QuoteRequest - Quote - Message - Order - Payment - Payout - Dispute Implementation Rules: - Preserve search and filter state. - Label entity types. - Disclose promoted listings. - Verify every trust claim. - Show price units. - Keep seller context visible. - Distinguish off-platform and marketplace transactions. - Preserve quote drafts. - Protect private documents. - Implement accessible dynamic states. - Avoid duplicate analytics events. === ACCEPTANCE CRITERIA === Search Context: Given a buyer applies filters and opens a listing, when the buyer returns to results, then the query, filters, sorting, comparison selections, and relevant result position remain available. Sponsored Disclosure: Given a listing is promoted, when it appears in search results, then it is clearly labeled as promoted in a way that is visually and programmatically understandable. Price Unit: Given a wholesale listing displays a price, when the buyer reviews the card and listing, then the currency, price unit, minimum order, and custom-quote status are clear. Verification: Given a supplier displays a verification state, when the buyer opens its explanation, then the interface states what was verified and avoids implying broader approval. Quote Draft: Given a buyer completes part of a quote request, when navigation or a recoverable error interrupts the flow, then entered information remains available according to verified persistence behavior. Mobile Comparison: Given a buyer compares three products on a narrow mobile viewport, when reviewing dimensions, then all compatible product information remains accessible without page-level horizontal scrolling. === REGRESSION TEST MATRIX === Roles: - Guest - Buyer - Buyer Team Member - Supplier - Supplier Team Member - Operator Listing Types: - Instant Purchase - Quote Only - Made to Order - Private Label - Unavailable - Under Review - Archived Search States: - Results - No Exact Match - Zero Results - Corrected Query - Loading - Error Quote States: - Draft - Submitted - Viewed - Responded - Accepted - Declined - Expired - Withdrawn Responsive: - Small Mobile - Standard Mobile - Tablet - Laptop - Desktop - 200% Zoom Accessibility: - Keyboard - Screen Reader - Reduced Motion - Reflow - Dynamic Results - Dialogs - Filters - Comparison === QA CHECKLIST === Discovery: - Verify homepage. - Verify categories. - Verify search. - Verify autocomplete. - Verify entity labels. - Verify no-result recovery. Filters: - Verify values. - Verify persistence. - Verify URL state. - Verify applied chips. - Verify Clear All. - Verify mobile behavior. Cards: - Verify listing type. - Verify supplier. - Verify price unit. - Verify minimum order. - Verify availability. - Verify rating count. - Verify sponsored disclosure. Listings: - Verify media. - Verify price. - Verify availability. - Verify seller context. - Verify policies. - Verify CTA. - Verify related listings. Seller Profiles: - Verify identity. - Verify verification. - Verify certifications. - Verify reviews. - Verify listings. - Verify contact actions. Transactions: - Verify quote requests. - Verify messages. - Verify cart. - Verify checkout. - Verify payment uncertainty. - Verify confirmation. Seller: - Verify onboarding. - Verify drafts. - Verify listing preview. - Verify moderation states. - Verify inventory. - Verify orders. - Verify payouts. Accessibility: - Verify search. - Verify filters. - Verify cards. - Verify ratings. - Verify dialogs. - Verify comparison. - Verify keyboard. - Verify screen readers. - Verify zoom and reflow. === RISKS === Risk: Unverified suppliers appear endorsed by the marketplace. Mitigation: Use clearly defined verification states and explain their scope. Risk: Product cards hide minimum-order requirements. Mitigation: Display minimum order and price unit before listing selection. Risk: Search mixes supplier and product results. Mitigation: Group and label entity types. Risk: Buyer assumes the marketplace protects off-platform transactions. Mitigation: Explain transaction responsibility and protection scope before action. Risk: Seller documents are exposed. Mitigation: Apply role-based access, masking, secure storage, and privacy review. Risk: Promoted listings appear organic. Mitigation: Use persistent and accessible promoted labels. Risk: Mobile comparison becomes unusable. Mitigation: Use grouped dimensions and selected-product switching. === KNOWN LIMITATIONS === - Supplier verification requires operational validation. - Certification validity requires qualified review. - Search quality requires real data and ranking evaluation. - Availability and inventory require live-system validation. - Payments, commissions, and payouts require financial testing. - Reviews require eligibility and moderation validation. - Accessibility requires implementation testing. - Analytics must be implemented and verified. - Experiment results require sufficient marketplace traffic. - The architecture does not guarantee liquidity, trust, conversion, revenue, or reduced disputes. === FINAL INTEGRITY NOTE === All prices, fees, commissions, taxes, shipping terms, availability, fulfillment rules, reviews, ratings, seller verification, guarantees, refunds, cancellations, disputes, payment release, payouts, subscriptions, moderation, legal eligibility, and trust claims must be verified before publication. The marketplace architecture is designed to improve discovery, trust, comparison, conversion readiness, seller usability, and implementation consistency. It does not guarantee marketplace liquidity, conversion, revenue, seller success, buyer trust, retention, or reduced disputes.