[Phase 5] Epic: Advanced Reliability #37
Description
Priority: P3
Phase: 3
Type: Epic
Overview
Epic Goal: Transform StormCom into a multi-vendor marketplace platform enabling independent sellers to list products, manage inventory, and fulfill orders while the platform owner collects commission fees and provides shared infrastructure.
This epic targets:
- Marketplace Owners: Launch Amazon/Etsy-style platforms with 100+ vendors
- Vendor Sellers: Access built-in customer base without marketing costs
- Platform Revenue: 10-20% commission on every sale ($1M GMV = $100K-$200K revenue)
- Competitive Positioning: Compete with Sharetribe, Arcadier, CS-Cart
Business Value
- Recurring Revenue: 10-20% commission on all vendor sales
- Network Effects: More vendors → more products → more customers → more vendors
- Lower CAC: Vendors bring their own customers to platform
- Scalability: Onboard 100+ vendors without proportional support costs
- Enterprise Market: B2B marketplaces (wholesale, industrial supplies)
Child Issues
Phase 3.1 - Vendor Management (4 issues, 10 days)
-
Issue [WIP] Add RBAC and scoped API tokens for multi-tenant authorization #75: Vendor Onboarding & KYC (3 days)
- Vendor registration form (business name, tax ID, bank details)
- Document upload (trade license, NID/passport)
- Manual approval workflow (admin reviews documents)
- Automated KYC verification (Stripe Identity, Jumio)
- Vendor dashboard access after approval
-
Issue [WIP] Implement cache tags and product summary denormalization #76: Vendor Product Management (2 days)
- Vendor can create/edit/delete their own products
- Product approval queue (admin reviews before publish)
- Bulk product upload (CSV, 1,000 products)
- Product performance analytics (views, sales, revenue)
-
Issue [WIP] Add webhook infrastructure with delivery guarantees #77: Vendor Order Fulfillment (3 days)
- Vendor receives email notification on new order
- Mark order as shipped (upload tracking number)
- Customer notification when vendor ships
- Vendor-specific order history
- Auto-release payment to vendor (7-day hold after delivery)
-
Issue [WIP] Establish observability baseline with structured logging and metrics #78: Vendor Payouts (2 days)
- Commission calculation (platform fee: 10-20%)
- Payout schedule (weekly, bi-weekly, monthly)
- Payment methods (bank transfer, bKash, PayPal)
- Payout history dashboard (earnings, fees, refunds)
- Tax reporting (1099 forms for US vendors)
Phase 3.2 - Commission & Finance (3 issues, 7 days)
-
Issue [WIP] Implement rate limiting and throttling controls #79: Commission Engine (3 days)
- Configurable commission rates per vendor (5-25%)
- Tiered commissions (first $10K: 15%, next $10K: 10%)
- Category-based commissions (electronics: 8%, fashion: 12%)
- Commission split calculation (platform + payment processor)
- Commission invoice generation (monthly)
-
Issue [WIP] Introduce refund and return workflow primitives #80: Split Payments (2 days)
- Stripe Connect (split payment at checkout)
- Platform receives full amount, transfers to vendor after hold
- Refund handling (deduct from vendor balance)
- Dispute management (chargebacks, fraud)
-
Issue [WIP] Establish tracking for integrity foundations and risk matrix #81: Financial Reporting (2 days)
- Platform revenue dashboard (total GMV, commission earned)
- Vendor earnings report (per vendor, date range)
- Tax reporting (vendor sales tax, platform income)
- Export to QuickBooks, Xero
Phase 3.3 - Marketplace Features (4 issues, 9 days)
-
Issue Add unified Prisma schema with performance indexes for multi-tenant queries #82: Vendor Storefront (3 days)
- Public vendor page (
/vendors/acme-store) - Vendor logo, banner, description
- Vendor products listing
- Vendor ratings & reviews (4.5/5 stars)
- Follow vendor (get new product notifications)
- Public vendor page (
-
Issue Implement Product CRUD API with variants, CSV import, and image upload #83: Vendor Reviews & Ratings (2 days)
- Customers rate vendor after delivery (1-5 stars)
- Review text with product context
- Vendor response to reviews
- Flag inappropriate reviews (admin moderation)
- Vendor trust score (on-time delivery, product quality)
-
Issue [Phase 1] Product Dashboard UI with variant manager, image upload, and bulk actions #84: Multi-Vendor Cart & Checkout (2 days)
- Cart groups products by vendor
- Calculate shipping per vendor
- Commission split transparent to customer
- Multiple tracking numbers (one per vendor)
-
Issue ## Pull request overview #85: Vendor Analytics Dashboard (2 days)
- Sales trends (daily, weekly, monthly)
- Top-selling products
- Customer demographics (location, age, gender)
- Conversion rate (views → sales)
- Return rate
Acceptance Criteria (Epic Level)
-
Vendor Onboarding
- ✅ Vendor applies via registration form (5-10 minutes)
- ✅ Admin reviews application (documents, business info)
- ✅ Automated KYC via Stripe Identity (optional)
- ✅ Vendor receives approval email with dashboard link
- ✅ Onboarding time: <24 hours (manual) or <5 minutes (automated)
-
Product Management
- ✅ Vendor uploads products (one-by-one or CSV bulk)
- ✅ Admin approves products before publish (optional setting)
- ✅ Vendor manages inventory (stock levels)
- ✅ Vendor sets pricing (platform cannot override)
-
Order Fulfillment
- ✅ Vendor receives order notification (email + dashboard)
- ✅ Vendor marks order as shipped (tracking number required)
- ✅ Customer receives tracking info
- ✅ Payment released to vendor 7 days after delivery
-
Commission & Payouts
- ✅ Platform takes 10-20% commission on every sale
- ✅ Vendor sees commission breakdown (sale amount, fee, net earnings)
- ✅ Payouts processed weekly/bi-weekly/monthly
- ✅ Payment methods: bank transfer, bKash (Bangladesh), PayPal
-
Vendor Storefront
- ✅ Public vendor page with logo, banner, description
- ✅ List all vendor products
- ✅ Vendor ratings & reviews visible
- ✅ Follow vendor option
-
Financial Reporting
- ✅ Platform owner sees total GMV and commission revenue
- ✅ Vendor sees earnings, fees, refunds
- ✅ Export financial reports (CSV, PDF)
- ✅ Tax reporting (1099 for US, VAT for EU)
Technical Architecture
Vendor Onboarding Flow
Vendor Registration Form → Submit Application
↓
Admin Dashboard (pending applications)
↓
Admin reviews documents
↓
Approve → Send email → Create vendor account
Reject → Send email with reason
↓
Vendor logs in → Dashboard access
Commission Calculation
Order Total: $100
Product: $90 (vendor's pricing)
Shipping: $10 (vendor's shipping)
Platform Commission (15%): $100 × 0.15 = $15
Payment Processor (Stripe 2.9% + $0.30): $100 × 0.029 + $0.30 = $3.20
Vendor Earnings: $100 - $15 - $3.20 = $81.80
Platform Net: $15 - $3.20 = $11.80
Split Payment Flow (Stripe Connect)
Customer checkout → Stripe payment ($100)
↓
Stripe Connect (connected account = vendor)
↓
Hold funds (7-day period)
↓
Customer receives order
↓
7 days after delivery → Release to vendor ($81.80)
↓
Platform retains commission ($15)
Multi-Vendor Cart
Cart:
- Product A (Vendor 1): $50
- Product B (Vendor 2): $30
- Product C (Vendor 1): $20
Grouped by Vendor:
Vendor 1:
- Product A: $50
- Product C: $20
- Shipping: $5
- Subtotal: $75
Vendor 2:
- Product B: $30
- Shipping: $8
- Subtotal: $38
Total: $113
Commission (15%):
- Vendor 1: $75 × 0.15 = $11.25
- Vendor 2: $38 × 0.15 = $5.70
Success Metrics
| Metric | Target | Measurement |
|---|---|---|
| Active Vendors | 100+ | Vendors with 1+ sale in 30 days |
| GMV (Gross Merchandise Value) | $1M+/month | Total sales across all vendors |
| Platform Commission Revenue | $100K+/month | 10-20% of GMV |
| Vendor Retention Rate | >80% | Vendors active after 6 months |
| Average Vendor Revenue | $10K+/month | Total vendor earnings / active vendors |
| Customer Satisfaction | >4.5/5 | Average vendor rating |
| Payout Success Rate | >99% | (Successful payouts / Total payouts) × 100 |
Dependencies
Blocks:
- None (transforms platform into marketplace model)
Blocked By:
- Phase 1 completion (stable product/order infrastructure)
- [Phase 1] Order Processing API #24 (Order Processing API) - Core Order model
- [Phase 1] Epic: Storefront #19 (Product Management) - Product CRUD
- [Phase 1] Stripe Payment Integration #27 (Stripe Integration) - Payment infrastructure (Stripe Connect required)
Enhances:
- All StormCom features available to marketplace vendors
- Multi-tenant architecture extended to vendors
References
- Stripe Connect Docs: https://stripe.com/docs/connect
- Sharetribe (competitor): https://www.sharetribe.com/
- Arcadier (competitor): https://www.arcadier.com/
- Gap Analysis:
docs/research/codebase_feature_gap_analysis.md(Vendor model, commission engine) - Implementation Plan:
docs/research/implementation_plan.md(Marketplace architecture)
Risk Mitigation
| Risk | Impact | Mitigation |
|---|---|---|
| Fraudulent vendors | High | KYC verification, manual approval, escrow |
| Counterfeit products | High | Product approval queue, brand protection |
| Vendor disputes | Medium | Clear commission policy, vendor agreement |
| Payout failures | High | Test bank details, retry logic, manual fallback |
| Platform liability | High | Terms of service (vendors liable for products) |
| Customer support burden | Medium | Vendor handles support, platform mediates disputes |
Testing Strategy
- Vendor Onboarding: Test approval/rejection workflows
- Commission Tests: Verify calculations for all commission types
- Split Payment Tests: Stripe Connect sandbox testing
- Multi-Vendor Cart: Test cart grouping, shipping calculations
- Payout Tests: Mock bank transfers, verify amounts
Current Status
🔴 Not Started - Planned for Phase 3
Estimated Timeline
- Phase 3.1 (Vendor Management): 10 days (4 issues)
- Phase 3.2 (Commission & Finance): 7 days (3 issues)
- Phase 3.3 (Marketplace Features): 9 days (4 issues)
- Testing & QA: 5 days
- Total: 31 days (~6 weeks)
Strategic Note: Marketplace model unlocks 10x revenue potential. At 100 vendors averaging $10K/month sales, platform generates $100K-$200K/month commission revenue (vs $10K-$20K from single-store model). Stripe Connect makes split payments trivial. Target niche marketplaces (handmade, local artisans, B2B industrial) where Etsy/Amazon don't serve well. 7-day payment hold protects against fraud but maintain vendor trust with transparent communication.