•Redesigned and rebuilt 30+ React/TypeScript UI modules for Card Activities & Statements using SWR hooks, improving Visually Complete Time down to∼243 ms serving 5M+ users annually.
•Led the frontend development of Amex Plan It, a pay-over-time feature for Japan, marking a significant milestone launching on-card installment lending products across international markets for 10M+ global users.
•Developed Kotlin BFF APIs powering 50+ micro-frontend modules, improving data availability on card accounts and transactions and reducing downstream latency for multiple product teams.
•Implemented accessibility features using internal React component libraries with axe DevTools and screen reader testing, ensuring WCAG compliance and improving accessibility audit scores to 100%.
•Collaborated with product managers, designers, and engineering leads to define scope, delivery timelines, and cross-team integration requirements.