B2B Escrow Marketplace for African Diaspora

Full-Stack Developer Needed – Marketplace & Escrow MVP

I am looking for an experienced full-stack developer to build the first MVP version of a B2B marketplace and trust/escrow platform for the African diaspora.

The platform will allow diaspora clients to purchase services such as land acquisition, construction, and other local services, with an optional verification/protection upgrade.

Main Requirements

- Client, Provider, and Proxy user roles
- Marketplace with service listings and categories
- Service/product detail pages
- Client checkout and Shield upgrade options
- Basic transaction and escrow status management
- Proxy dashboard for field verification
- Mobile-friendly PWA for Proxy users
- Live camera/video capture from mobile
- GPS location capture when recording
- 50-meter GPS geofence verification using the Haversine formula
- Upload video + GPS + timestamp metadata
- Basic transaction approval/dispute workflow
- Airwallex API integration for payments/payouts
- Airwallex webhook handling for payout status
- Provider and Proxy payout calculations
- Basic admin dashboard
- Email/SMS notification integration
- Secure backend/database architecture

MVP Scope

For the initial phase, we will focus on the Day-One marketplace categories and the core transaction → verification → approval → payout workflow. Additional categories and advanced functionality can be added in later phases.

Developer Requirements

Please apply only if you have experience with:

- Full-stack web development
- REST APIs
- Payment gateway/API integrations
- Webhooks
- PostgreSQL/MySQL or similar databases
- React/Next.js or another modern frontend framework
- Node.js/PHP or similar backend technology
- Mobile PWA development
- Browser camera and geolocation APIs

Experience with Airwallex, escrow/payment systems, GPS verification, or marketplace platforms is highly preferred.

Budget

$500 for the initial MVP phase.

Please provide:

1. Your relevant experience
2. Examples of similar marketplace/payment projects
3. Your preferred technology stack
4. Estimated delivery time
5. Cost

The complete technical specification will be provided to shortlisted developers.