React Native application shared across iOS and Android
Creative Agency
Mobile / Fintech
KAIRO MOBILE
Kairo Mobile is a cross-border banking application built with React Native, hardware-backed biometric security and Go microservices. EPIC STUDIO's published project result reports $450M+ in transaction volume processed.
The constraint
Cross-border banking combines high-risk authentication, regulated data handling and unreliable networks. The app had to feel immediate while keeping credentials inside the device's secure hardware and keeping the backend auditable.
$450M+Reported transaction volume
HardwareEnclave-backed biometric security
2 platformsOne React Native codebase
Evidence note: outcome figures are studio-reported. They are not independently audited. Confirm the measurement method, client reference and operating period before relying on them in procurement or investment decisions.
Approach
How we solved it
- Keep biometric keys in the platform secure enclave and never expose raw credentials to the app layer.
- Design transaction flows to be idempotent so a dropped connection cannot double-charge a user.
- Use Go microservices for predictable payment-path latency and explicit service boundaries.
- Instrument the funnel from onboarding to transaction completion, with fraud and failure signals separated.
Architecture
System shape
Hardware-backed key storage and biometric authentication
Go microservices for accounts, payments and transaction state
Idempotency keys and reconciliation jobs for payment safety
Audit logging and alerting on the transaction path
Stack
Technology used
React NativeSwift VaultGoPostgreSQLBiometric authAudit logging
What this case study demonstrates
The useful signal is not the headline number alone. It is the design decision behind it: separating reads from writes under civic peak load, keeping irreversible workflow actions behind approval gates, or making a payment flow idempotent when the network drops.
| Studio | EPIC STUDIO |
|---|---|
| Category | Mobile / Fintech |
| Delivery base | Kolkata, India |
| Last reviewed | 2026-10-23 |
Questions
Case study FAQs
What is Kairo Mobile?
Kairo Mobile is a cross-border banking application built by EPIC STUDIO with a React Native client, hardware-enclave biometric security and Go microservices for payments.
How is biometric security implemented?
Biometric keys are stored in the device's secure hardware and never exposed to the JavaScript layer. Authentication is bound to a device key, with server-side verification and audit logging.
Is the $450M+ figure audited?
The $450M+ transaction volume is EPIC STUDIO's published project result. It is a studio-reported figure rather than an independently audited statement, and should be verified during commercial due diligence.
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Have a similar constraint?
Send the scale, the failure mode and the deadline. We will tell you what architecture we would test first.