Cards Web Module: Built and optimized the
module in React + TypeScript + Redux + Sass,
improving load times and scalability behind
AWS CloudFront for thousands of concurrent
users.
• PCI Web SDK (business milestone): Led design,
implementation, and certification of a web SDK
for card tokenization and PAN reveal,
integrated with merchants and partners with
zero regressions.
• Security & Compliance: Secured iframe ↔ host
communication (postMessage, origin validation,
sanitization); HttpOnly/Secure/SameSite
cookies, CORS, Referrer-Policy; SSO
OAuth2/OIDC with short-lived tokens and safe
refresh; CORP/COOP to isolate the JS context.
• Architecture & Performance: Drove web
architecture decisions, code-splitting, lazy
loading, memoization; leveraged IndexedDB for
data caching; skeletons and progressive
hydration; virtualized lists and controlled
aspect-ratio to stabilize layout.