React performance on a multi-currency payments platform
Multi-currency payments and card management platform serving customers across 180+ countries, covering global transfers, transaction tracking, KYC, and employee expense management.
- Volopa Financial Services
- Company
- Senior Full-Stack Developer
- Role
- Jun 2023 - Oct 2025
- Period
- London, United Kingdom
- Location
01 The work
What I did
- 01
Shipped production features across a multi-currency payments, card management, and employee expense 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.
- 02
Optimized large-scale data tables with react-window virtualization and memoization, reducing render time by approximately 70% on datasets exceeding 20,000 rows.
- 03
Introduced dynamic code splitting that cut initial bundle size by approximately 35%, directly improving First Contentful Paint on financial dashboards.
- 04
Refactored a legacy codebase into a modular architecture with a reusable component library, reducing feature development time by approximately 25%.
02 Tools
Stack
03 Articles
How it was done
- Rendering 20,000 rows in React without freezing the pageA reproducible React virtualization benchmark with 20,000 synthetic rows, raw runs, median filter delays, fixed-height windowing code and measurement limits.
Work with me
Available immediately
Based in Lahore, Pakistan, open to remote work and relocation.
Related experience: Frontend developer.