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Paystack-class Fintech · 2025
A consumer fintech app rebuilt for speed and trust.
End-to-end rebuild of a fintech super-app — auth, KYC, payments, ledger and a real-time mobile UI that feels instant on flaky networks.
Full Stack Lead · Mobile · Payments
- +38%
- DAU lift
- 180ms
- Median TTI
- 99.99%
- Payment uptime
The brief
The old app was slow, opaque, and bled trust on every failed transaction. We had one release window to flip it.
The approach
An idempotent ledger, optimistic UI with reconciled state, queued offline payments, and a design system built for thumbs.
Outcome
DAU up 38% in the first month post-launch, payment uptime to four nines, and a measurable drop in support tickets per active user.