Hariharan Natarajan

Led the design and development of web and mobile-web features for a high-traffic e-sports betting platform with 100K+ concurrent users. Modernized the frontend codebase by migrating from legacy React class components to functional components with Hooks, and from a legacy CRA setup to a more scalable bundling/build approach (Rspack), reducing build time by 70%+. Owned end-to-end delivery of business-critical features including a Favorites feature (70% QoQ adoption lift). Proposed and led a Next.js SSR and GraphQL-based microfrontend architecture, improved platform theming and white-label delivery using a headless CMS and CDN, drove compliant regulatory changes (100% under deadlines), and optimized performance and maintainability through reusable components, code reviews, and mentorship. Contributed to sportsbook API integrations and real-time odds/betting workflows supporting a significant portion of platform revenue.

Developed scalable customer-facing applications for personalized fitness, wellness tracking, and an e-commerce platform. Integrated Prismic headless CMS to enable dynamic content delivery with CDN-backed assets and improved application performance and UX. Integrated and configured Razorpay payment gateway with UPI support to enable secure payments for 1000+ monthly transactions. Collaborated with backend to define API contracts and integrated REST APIs while optimizing data structures for frontend consumption. Implemented accessibility and compliance aligned with WCAG, optimized performance via code splitting, lazy loading, memoization, and caching, and built unit/integration tests using Jest and React Testing Library to improve release confidence and coverage. Coordinated across product, design, and business stakeholders to ship improvements iteratively.

Delivered performant, pixel-perfect reusable UI components for Verizon, reducing development effort by 40%. Implemented robust frontend validation and helped resolve production issues through cross-functional collaboration, improving checkout accuracy and application stability. Trained QA engineers to automate end-to-end testing workflows using Cypress, reducing manual effort by over 80% and improving test coverage and release confidence. Contributed to building and maintaining frontend features with a focus on quality, maintainability, and consistent user experience.