FinTech

FinTech Core Migration

How we re-architected a legacy payment dashboard serving 50,000+ daily users, reduced load times by 90%, and increased conversion rates by 18%.

90%

Faster Load Time

LCP: 4.2s → 0.4s

+18%

Conversion Rate

Faster checkout flow

98/100

Lighthouse Score

Mobile performance

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The Challenge

A Series B FinTech company approached us with a critical problem: their React 16 + Express dashboard was hemorrhaging users due to slow load times. Initial diagnostics revealed a 4.2s LCP and a massive 1.8MB JS bundle blocking the main thread.

The Protocol

Next.js 14 App Router Migration

Chose Next.js for React Server Components, ISR, and edge deployment compatibility. Migrated incrementally over 6 weeks.

Performance Architecture

Eliminated 600KB of client-side JS using RSC. Implemented streaming with Suspense and edge-deployed balance checks.

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