How to Build a Nigerian Fintech App: P2P Currency Exchange Architecture

The Fintech Opportunity in Nigeria

Nigeria's currency exchange market is massive, driven by business import/export needs, diaspora remittances, and forex trading. P2P platforms reduce spread costs for users compared to bank rates.

Core Architecture

Build on Node.js with BullMQ for order matching, Socket.io for real-time updates, and PostgreSQL for transactional integrity. Use Redis for rate caching and session management.

Order Matching Engine

Implement a basic order book: buy orders sorted by price descending, sell orders sorted price ascending. Match when a buy price >= sell price. Process fills atomically in database transactions.

Escrow and Settlement

Hold funds in escrow during a transaction. Release on both parties confirming payment. Implement a 24-hour dispute window before automatic settlement.

Compliance Considerations

CBN regulations require KYC verification for Nigerian fintech platforms. Integrate a KYC provider (Smile Identity, Dojah) for NIN and BVN verification at account creation.