Case study · Fintech
Reevo
A credit card app for a UK fintech: card management, transactions and payments, with Visa 3-D Secure, biometric sign-in and hardening against the OWASP Mobile Top 10.
- Company
- Gojoko Technologies
- Role
- React Native Developer, Aug 2023 to Sep 2024
- Industry
- Fintech
- Platforms
- iOS and Android
- Year
- 2024
- Stack
- React Native
- GraphQL
- Apollo
- Biometrics
The challenge
A UK credit card had to handle card management, transactions and payments with the security a regulated card product needs, and stay smooth on everyday phones.
What I built
- Built the Reevo credit card app for a UK fintech.
- Integrated Visa APIs and 3-D Secure; sped up APIs 30% with Apollo caching.
Results
From release builds and production telemetry.
- API response
- −30%~850ms → ~595ms
- Frame drops
- −58%9.2% → 3.8%
The card product has since been retired. Numbers are from its production builds.
Building something similar?
Praveen Singh is open to Senior React Native roles and consulting, and can start immediately.