Launched a consumer fintech app on iOS and Android with 60K signups in week one
A fintech startup with strong distribution but no mobile team needed a cross-platform launch tied to a press moment. We shipped iOS and Android binaries plus the underlying KYC and ledger services with a 4-month runway.
Client identity withheld. All figures, timelines, and tactics are from a real engagement.
What changed in 4 months.
Launch-week signups
Press peak
KYC completion rate
Industry avg ~50%
App store rating
iOS / Android
P99 balance read
From cold start
What they were up against.
- 1
Hard launch date tied to a Series A press cycle — no slippage allowed
- 2
Regulated KYC flow with Onfido + custom risk rules
- 3
Real-time balance display backed by a double-entry ledger
- 4
App Store and Play Store first submissions — no prior approvals to lean on
How we shipped their product.
Step 01
Cross-platform from one codebase
React Native + Expo with native modules only where we had to. Single team shipped both stores in lockstep.
Step 02
Ledger-first backend
Built a double-entry ledger in Postgres before any UI — every balance shown in the app is provable from raw events.
Step 03
Compliance baked in
Onfido KYC, sanctions screening, and audit trails wired in before launch. No retrofit headaches on day one.
Step 04
Store-submission playbook
Two-week pre-submission compliance review with Apple and Google reviewer notes drafted ahead of time. Approved first pass on both stores.
What it meant for the business.
Both stores approved on first submission with zero re-review cycles
Zero P0 incidents through launch week despite 30× projected traffic
Engineering team hired into a clean React Native + Node monorepo six months later
Series A closed two months after launch citing 'product velocity' as the lead metric
"We launched on the day we promised investors. Six figures of signups in week one and zero downtime — that's the only metric that matters for a fintech."
— Head of Product, consumer fintech startup
Want this for your fintech product?
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