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Freelancer Overview
Franklyn Roth +1 (970) 988-7207 [email protected] Senior Frontend Engineer — React / TypeScript / Node.js Summary Frontend-focused JavaScript Engineer with 9 years of remote experience building scalable, performant, and accessible web applications. Recently completed sabbatical learning Spanish to a conversational level and global perspective traveling across 11 countries. Expert in React, TypeScript, and modern UI architecture with proven record optimizing Core Web Vitals, integrating REST APIs, and leading cross-team initiatives that improve UX and developer velocity. Passionate about clean, maintainable code and creating products users love. Technical Skills Languages: JavaScript (ES6+), TypeScript, HTML5, CSS3, C# Frontend: React, Redux, Zustand, Vue, Lit, Web Components, Responsive Design, Accessibility (WCAG 2.1 AA) Backend: Node.js, Express, RESTful APIs, .NET Core Tooling: Git, Webpack, Vite, Jest, Cypress, CI/CD, Docker, Azure DevOps Practices: Agile/Scrum, Test-Driven Development, Code Reviews, Performance Optimization Professional Experience IHS Markit (S&P Global) — Senior Frontend Developer 2015 – 2025 | Boulder, CO | Remote ● Developed and maintained React and Vue applications serving 10K+ daily users across global financial platforms ● Improved load performance by 40% through code-splitting, lazy loading, and optimized API integrations ● Refactored React class components into functional components with hooks and context, cutting technical debt ● Implemente