Haqqpay

Problem

Users need a reliable way to exchange currency and complete peer deals — with clear rates, verified identities, secure wallets, and protection against failed or duplicate transactions.

Context

Financial platform where correctness matters more than speed. Every deal, payout, and webhook retry must stay traceable, idempotent, and safe from race conditions on concurrent wallet operations.

Approach

• Centralised transaction management with explicit states and BullMQ processors for async settlement, locked deals, and payouts.
• Cached exchange rates in Redis with TTL so rate lookups stay fast without stale pricing in production.
• Integrated SumSub for KYC and multiple payment rails (Trust Payments, Yapily, Paystack, and others) behind webhook handlers.
• Added Sentry, throttling, MFA, and scheduled reconciliation jobs so production issues surface before users do.

Architecture

Outcome

Live exchange platform processing peer deals, Haqqpay-managed deals, payouts, and rate-driven conversions — deployed via Docker on DigitalOcean with background job processing for financial workflows.