React performance on a multi-currency payments platform
Senior Fullstack Developer · Volopa Financial Services · Jun 2023 - Oct 2025 · London, United Kingdom
Multi-currency payments and card management platform serving customers across 180+ countries, covering global transfers, transaction tracking, KYC, and employee expense management.
What I did
- Shipped production features across a multi-currency payments and card platform covering transfers, transaction tracking, and KYC for customers in 180+ countries, with a React and Ant Design frontend over PHP and Node.js backend services, meeting WCAG 2.1 accessibility and UK fintech regulatory standards.
- Optimized large-scale data tables with react-window virtualization and memoization, reducing render time by approximately 70% on datasets exceeding 20,000 rows.
- Introduced dynamic code splitting that cut initial bundle size by approximately 35%, directly improving First Contentful Paint on financial dashboards.
- Refactored a legacy codebase into a modular architecture with a reusable component library, reducing feature development time by approximately 25%.
Stack
ReactTypeScriptZustandAnt DesignNode.jsPHP