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I’m a Senior Frontend Engineer with 10+ years of experience building scalable, high-performance web applications using ReactJS, JavaScript, and TypeScript. I enjoy designing responsive user interfaces, creating reusable component architectures, and partnering closely with backend, product, and design teams to deliver business-critical features. Over my career, I’ve led major frontend modernization efforts, improved performance and maintainability through engineering best practices, and owned end-to-end implementations—from API integrations and state management to testing and accessibility. I also have strong experience with CMS-driven and white-label solutions, performance optimization, and delivering reliable releases in Agile environments.…I’m a Senior Frontend Engineer with 10+ years of experience building scalable, high-performance web applications using ReactJS, JavaScript, and TypeScript. I enjoy designing responsive user interfaces, creating reusable component architectures, and partnering closely with backend, product, and design teams to deliver business-critical features. Over my career, I’ve led major frontend modernization efforts, improved performance and maintainability through engineering best practices, and owned end-to-end implementations—from API integrations and state management to testing and accessibility. I also have strong experience with CMS-driven and white-label solutions, performance optimization, and delivering reliable releases in Agile environments.

Hariharan Natarajan

Front-End Developer, Software Engineer, Web Developer, +2

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I’m a Senior Frontend Engineer with 10+ years of experience building scalable, high-performance web applications using ReactJS, JavaScript, and TypeScript. I enjoy designing responsive user interfaces, creating reusable component architectures, and partnering closely with backend, product, and design teams to deliver business-critical features. Over my career, I’ve led major frontend modernization efforts, improved performance and maintainability through engineering best practices, and owned end-to-end implementations—from API integrations and state management to testing and accessibility. I also have strong experience with CMS-driven and white-label solutions, performance optimization, and delivering reliable releases in Agile environments.…I’m a Senior Frontend Engineer with 10+ years of experience building scalable, high-performance web applications using ReactJS, JavaScript, and TypeScript. I enjoy designing responsive user interfaces, creating reusable component architectures, and partnering closely with backend, product, and design teams to deliver business-critical features. Over my career, I’ve led major frontend modernization efforts, improved performance and maintainability through engineering best practices, and owned end-to-end implementations—from API integrations and state management to testing and accessibility. I also have strong experience with CMS-driven and white-label solutions, performance optimization, and delivering reliable releases in Agile environments.

Available to hire

I’m a Senior Frontend Engineer with 10+ years of experience building scalable, high-performance web applications using ReactJS, JavaScript, and TypeScript. I enjoy designing responsive user interfaces, creating reusable component architectures, and partnering closely with backend, product, and design teams to deliver business-critical features.

Over my career, I’ve led major frontend modernization efforts, improved performance and maintainability through engineering best practices, and owned end-to-end implementations—from API integrations and state management to testing and accessibility. I also have strong experience with CMS-driven and white-label solutions, performance optimization, and delivering reliable releases in Agile environments.

Skills

Experience Level

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Work Experience

Senior Software Engineer - Frontend at Blaize

April 1, 2022 - Present

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.

Senior Frontend Engineer at CardioBox

April 1, 2020 - April 30, 2021

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.

Associate Frontend Developer at Cognizant Technology Solutions

April 1, 2019 - April 30, 2020

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.

Frontend Developer at Changepond Technologies

February 1, 2017 - April 30, 2019

Developed and maintained secure, scalable frontend applications for government healthcare and education clients. Contributed to SIS, an information management platform for Malaysia’s Ministry of Health, by designing and implementing frontend workflows supporting merit point calculations and funding-related assessments. Built key features for DRS (UK), an e-learning platform supporting course management and real-time collaboration, including WebSocket-based live chat functionality for a £3M investment initiative. Focused on delivering reliable UI functionality and working effectively with stakeholders to meet project needs.

Junior Web developer at Gem3s Technologies

July 1, 2015 - February 28, 2017

Contributed to a HIPAA-compliant telemedicine and EMR platform by building React-based frontend features, integrating backend APIs, resolving production issues, and supporting high-quality Agile releases. Assisted with automated testing and continued improvement of frontend reliability, collaborating with the wider engineering team to deliver secure and stable healthcare workflows.