Vinay Kumar Mule

About Vinay Kumar Mule

I bring a strong technical background as a full stack developer, with over five years of…

Experience

1. Frontend Developer

   American Express

   Dec 2024 — Present · Phoenix, AZ, US

   Developed and optimized the both EXTERNAL and INTERNAL American Express Developer Portal using React, Redux, JavaScript and RTK Query, improving API documentation navigation and reducing data-fetching overhead by 25%. • Integrated GraphQL API Gateway on the Node.js backend, consolidating multiple services into a single queryable endpoint, enhancing API response times by 40%. • Enhanced UI/UX of the portal by creating reusable, responsive DLS components, improving user accessibility and engagement by 20%.• Optimized performance using lazy loading, code-splitting, and server-side rendering (SSR), improving page load speeds by 25% and enhancing the user experience.• Integrated new API products (Fraud Prevention, Payments) into the developer portal, streamlining third-party adoption and improving API discoverability.• Refactored legacy React components with custom hooks and dynamic state management, improving maintainability and reducing code duplication. • Integrated new API products (Fraud Prevention, Payments, Data Intelligence) into the developer portal, simplifying third-party access and accelerating API integration by 30% through improved documentation.• Ensured proper accessibility compliance by correctly handling id props in UI components, enhancing user experience and consistency. • Migrated API testing to Mock Service Worker (MSW), replacing Jest.spyOn mocks, which reduced test flakiness by 40% and improved API test coverage for front-end components.• Resolved complex Git conflicts using cherry-pick, rebase, and force push, ensuring a clean and conflict-free development workflow. • Optimized Redux state management by integrating RTK Query, reducing API boilerplate and improving data fetching performance. • Refactored legacy UI components in React, migrating class-based components to functional components with React Hooks, reducing re-renders and improving maintainability.