A cross-platform mobile bank that shipped to a 4.9★ store rating.

Vault's roadmap was ambitious and the team was small. The MVP had to ship in twelve weeks, with biometric login, P2P transfers, a virtual card, and a spending insights view — all on a single codebase the team could maintain for the next three years.

We worked backwards from the moment a customer opens the app. Every design choice — onboarding, animations, empty states — was tested against a single question: does this make Vault feel like a tool you'd keep on your home screen, or one you'd bury in a folder?

React Native for the app shell, with a thin native bridge for biometrics and secure storage. The backend is a small set of Firebase + AWS Lambda services, with Plaid for bank linking and Stripe Issuing for the card program. We treated observability as a feature from day one — every screen, every action, every error.

The app shipped on schedule, hit a 4.9★ store rating within the first month, and has not had a P1 incident since launch. 92% of logins use biometrics, cold-start to dashboard runs in under three seconds, and the team has shipped two major feature releases without growing the engineering org.