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Fintech2024

Rebuilding a Banking App for 50K Users

Client

FinFlow

Industry

Fintech

Year

2024

Result

3x faster load times, 40% increase in daily transactions

// THE CHALLENGE

What they were facing.

Their React Native app was built by three different agencies over four years. The codebase was a patchwork of conflicting patterns, the API was a monolith hitting its limits, and their iOS crash rate was at 2.3%.

// THE SOLUTION

How we helped.

We embedded a 6-person squad for 8 months. Complete rewrite with shared component library, new microservices architecture, and automated testing coverage from 12% to 89%.

// THE OUTCOME

The results.

Crash rate dropped to 0.1%. App Store rating improved from 3.2 to 4.7 stars. Engineering team velocity doubled after handoff.

Tech Stack

React NativeNode.jsPostgreSQLRedisAWSPlaid API

Project Tags

React NativeNode.jsPlaidAWS

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// WHAT WE BUILT

Project deliverables.

Rebuilding a Banking App for 50K Users