Agro B2B Marketplace — MVP Architecture & Development Plan Date: October 06, 2025
This document provides the full architecture, recommended tech stack, infrastructure plan, and cost estimates for developing the Agro B2B Marketplace MVP — a B2B wholesale agro-marketplace with escrow and KYC verification.
Admin defines SKUs and categories.
Vendors can only list from approved SKUs.
Buyers search/filter only approved categories.
2. KYC for Buyers and Sellers
Upload CAC/ID verification.
Admin dashboard for verification.
Verified/Unverified badges.
3. Escrow (Trust Accounting)
Buyer pays via PSP to escrow.
Auto or manual release after confirmation.
Admin can resolve disputes or refunds.
Tier 3 (New) → Tier 2 (Verified) → Tier 1 (Certified).
Tier displayed on storefront.
1–5 star post-delivery ratings.
Auto-computed stats: On-time %, Dispute %, # of Orders.
⚙️ Phase 2 (Should-Have Features)
RFQ/RFP System: Buyers post RFQs; sellers respond with quotes.Motivated Seller: Discount flag and alert system.Farmer Proxy Management: Agents onboard and manage farmers with commissions.
High-Level System Architecture ┌────────────────────────┐
│ CLIENTS │
├────────────────────────┤
│ Buyers / Sellers │
│ Field Agents / Admins │
└──────────┬─────────────┘
│
▼
┌────────────────────────────────────────┐
│ API GATEWAY / BACKEND │
│────────────────────────────────────────│
│ Auth Service (JWT, RBAC) │
│ User, KYC, Product, Escrow Services │
│ Transaction, Notification, Rating APIs │
│ Admin Tools, RFQ Management │
└──────────┬─────────────┬───────────────┘
│ │
▼ ▼
┌─────────────────┐ ┌─────────────────┐
│ DATABASE (SQL) │ │ STORAGE (S3) │
│ PostgreSQL │ │ Docs, images │
└─────────────────┘ └─────────────────┘
│
▼
┌────────────────────────────┐
│ WORKERS / JOB QUEUE │
│ (Redis + BullMQ / Celery) │
│ - Escrow release timers │
│ - Tier updates │
│ - Notifications │
└────────────────────────────┘
│
▼
┌────────────────────────────┐
│ THIRD PARTY INTEGRATIONS │
│ Paystack / Flutterwave │
│ VerifyMe / Dojah (KYC) │
│ Twilio / WhatsApp / Email │
└────────────────────────────┘
Entity
Relationships
Description
User 1→Many Listings, Transactions
Buyer, Seller, Agent, Admin
KYC 1→1 User
Stores docs, verification status
Listing Many→1 Seller
Vendor product listing
Product_SKU 1→Many Listings
Admin-controlled SKU list
Transaction 1→1 Escrow
Buyer-seller transaction
Escrow 1→1 Transaction
Payment tracking
Rating Many→1 Seller
Buyer feedback
RFQ 1→Many Quotes
Buyer procurement request
Quote Many→1 Seller
Seller offer response
Tier 1→1 Seller
Verification/compliance tier
Notification 1→1 User
Event-based alerts
Layer
Stack
Reason
Web
Next.js (React)
SEO-friendly, modern UI
Mobile
React Native (optional)
Shared logic from web
Styling
Tailwind CSS
Rapid prototyping
Component
Stack
Reason
Core API
NestJS / Django REST Framework
Modular, scalable
Database
PostgreSQL
Reliable, relational
Storage
AWS S3 / Cloudinary
Secure doc storage
Queue
Redis (BullMQ/Celery)
Async jobs
Notifications
Twilio / WhatsApp / SendGrid
Omni-channel alerts
Payment
Paystack / Flutterwave
Escrow + split payouts
Auth
JWT + RBAC
Multi-role security
Layer
Recommendation
API Hosting
Render / Railway / AWS ECS
Database
AWS RDS / Supabase
CDN
Cloudflare
CI/CD
GitHub Actions
Monitoring
Sentry / Datadog
🧭 Timeline (4-Month MVP Plan)
Phase
Duration
Deliverables
Phase 1 – Core MVP
8–10 weeks
KYC, Escrow, Listings, Tiers, Ratings
Phase 2 – RFQ + Proxy + Motivated Sellers
6 weeks
RFQ + Agent modules
Phase 3 – Admin Tools & Dashboard
3 weeks
KYC admin, escrow management, disputes
Total ≈ 4 months
Ready for pilot launch
👥 Team Composition & Cost Breakdown
Role
Responsibility
Duration
Cost/Month
Total
Tech Lead / Architect
System design, integrations
4 mo
$2,500
$10,000
Backend Engineer
APIs, DB, Escrow logic
4 mo
$2,000
$8,000
Frontend Engineer
Web app (Next.js)
4 mo
$1,800
$7,200
UI/UX Designer
Wireframes & flows
1 mo
$1,200
$1,200
DevOps Engineer
CI/CD, infra setup
1 mo
$1,500
$1,500
QA Tester
Manual & API testing
1.5 mo
$1,200
$1,800
Project Manager
Agile sprints, reporting
4 mo
$1,500
$6,000
💰 Total Development Cost: ≈ $35,700
💵 Infrastructure Costs (Monthly)
Service
Provider
Cost
Hosting / API
Render / AWS EC2
$80–$150
Database
RDS / Railway
$50
File Storage
S3 / Cloudinary
$20
Redis Queue
Upstash
$20
Notifications
Twilio / Termii
$30–$80
Monitoring
Sentry / Logtail
$20
Domain + SSL
Cloudflare / Namecheap
$10
Total $250–$350/month
Category
Cost
Development (Team)
$35,700
Infra (4 months)
$1,200
KYC + Escrow setup
$500
Total MVP ≈ $37,500 USD
Add AI Fraud Scoring for KYC/transactions.
Enable multi-currency wallets (NGN, GHS, USD) .
Build offline agent app / POS onboarding .
Shift to event-driven architecture (Kafka/NATS) post-MVP.
Prepared by: ChatGPT (GPT-5)For: Agro B2B Marketplace — MVP PlanningFounder: Richard Amatokwu
🗓️ Detailed 4-Month MVP Sprint Roadmap (with Team Effort Estimates) Month 1 – Foundation & Core Setup (Weeks 1–4) Objective: Build strong foundations — architecture, database, authentication, and KYC onboarding.
Week
Focus Area
Deliverables
Lead Role
Supporting Roles
Week 1
Environment Setup
CI/CD pipelines (GitHub Actions), staging servers (Render/AWS), database & storage setup (Postgres + S3), project scaffolding (NestJS + Next.js).
DevOps Engineer
Tech Lead, Backend
Week 2
Auth & RBAC
JWT authentication, role management (Admin, Buyer, Seller, Agent), user onboarding flows.
Backend Engineer
Frontend, QA
Week 3
KYC Module
KYC document upload, VerifyMe/Dojah API integration, admin approval UI, verification badges.
Backend Engineer
Frontend, QA
Week 4
Admin SKU Management
CRUD for product SKUs, category locking logic, vendor listing restrictions.
Frontend Engineer
Backend, PM
Month 2 – Escrow, Listings, & Transactions (Weeks 5–8) Objective: Enable transactions, escrow flows, and marketplace listings.
Week
Focus Area
Deliverables
Lead Role
Supporting Roles
Week 5
Product Listings
Vendor product CRUD, image upload, SKU linkage.
Frontend Engineer
Backend
Week 6
Escrow Integration
Paystack/Flutterwave escrow API integration, split payment logic.
Backend Engineer
Tech Lead
Week 7
Order Lifecycle
Checkout → escrow → delivery confirmation → payout.
Backend Engineer
QA, PM
Week 8
Dispute Handling
Admin dispute panel, evidence upload, partial refund handling.
Frontend Engineer
Backend, Admin Ops
Month 3 – Reputation, RFQ, & Proxy Features (Weeks 9–12) Objective: Add trust layers, matching logic, and proxy support.
Week
Focus Area
Deliverables
Lead Role
Supporting Roles
Week 9
Ratings & Metrics
1–5 star ratings, seller stats (on-time %, dispute %, #orders).
Backend Engineer
Frontend, QA
Week 10
Seller Tiers
Auto-upgrade logic, Tier badge display, compliance doc upload.
Backend Engineer
Frontend
Week 11
RFQ/RFP System
Buyer RFQ form, seller quotes, quote acceptance, escrow linkage.
Backend Engineer
Frontend, PM
Week 12
Proxy/Agent Module
Agent-farmer link, commission tracking, “Proxy Managed” tag display.
Tech Lead
Backend, Frontend
Month 4 – Admin Tools, Notifications, & Launch Prep (Weeks 13–16) Objective: Build admin analytics, notification pipelines, and finalize for production launch.
Week
Focus Area
Deliverables
Lead Role
Supporting Roles
Week 13
Notification System
SMS (Termii/Twilio), WhatsApp alerts, email triggers (SendGrid).
Backend Engineer
DevOps
Week 14
Admin Dashboard
Analytics widgets, user/tier management, escrow control.
Frontend Engineer
Backend
Week 15
QA & UAT
Regression testing, load/stress testing, staging deployment.
QA Engineer
All Developers
Week 16
Launch Prep
Production deploy, vendor onboarding, go-live checklist.
Project Manager
Tech Lead, QA
🧮 Effort Allocation Summary
Role
Avg. Monthly Effort
Key Responsibilities
Tech Lead / Architect 60–80 hrs/month
Oversight, reviews, system design, critical integrations
Backend Engineer 160 hrs/month
Core API, KYC, Escrow, RFQ, Notifications
Frontend Engineer 160 hrs/month
Marketplace UI, Admin Dashboard, Listings
UI/UX Designer 40 hrs (Month 1)
Initial design & prototyping
QA Tester 60 hrs/month (from Month 2)
Manual/API testing, UAT
DevOps Engineer 40 hrs (Month 1 + 10 hrs/month ongoing)
CI/CD, infra, monitoring
Project Manager 80 hrs/month
Sprint management, progress tracking, reporting
Month
Primary Outcomes
Month 1 Infrastructure + KYC + Admin SKU controls
Month 2 Escrow and transaction flow completed
Month 3 Ratings, RFQ, Proxy onboarding operational
Month 4 Full admin analytics, notifications, launch readiness
