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Sterling PayFinTech

Migrating Legacy Fintech to Next.js 14 Zero Downtime

0ms
During Migration
98/100
Performance Score
+45%
Lead Gen Increase

The Challenge

The client's legacy Angular codebase took 8s to load, causing a 40% drop-off rate. They needed to migrate to a modern stack without disrupting $50M in daily transaction volume.

Our Solution

We utilized the 'Strangler Fig' pattern to migrate routes incrementally to Next.js 14. We built a parallel static-first frontend that communicated with their legacy backend via a new GraphQL mesh layer.

  • Scalable architecture design
  • Performance optimization & caching

"We were terrified of touching the legacy code. Finnitrex not only migrated us safely but improved our site speed by 400% in the process."

Marcus ThorneOperations Director, Sterling Pay

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Tech Stack

Next.js 14GraphQLNode.jsDockerAWS ECS

Services

  • Custom Development
  • System Architecture
  • UI/UX Design
  • Cloud Infrastructure