Linq

Problem

A consumer payments app has to stay usable offline and still pass PCI-DSS, while talking to banks, identity checks and wallets it does not control.

What I did

Architected an offline-first React Native and TypeScript app. Integrated Plaid for bank linking, SumSub for KYC, Apple Pay and Google Pay, and multi-currency wallets.

What happened

100K+ transactions processed with zero production incidents.