Paul U.

Product Engineer| AI Engineer | React | Vue | Node | Python

I’m Paul Upendo, a Senior Front-End Engineer specializing in React, Vue, JavaScript, Next.js, Node.js, and Firebase. I’ve worked both as a top independent freelancer and as an engineer on Upwork’s internal Monetization Engineering team, where I improved platform performance, rebuilt critical features, and helped drive revenue at enterprise scale. I bring a product-focused, performance-driven approach to front-end engineering — delivering fast, reliable, and scalable interfaces that directly support business goals. What I Deliver: * High-performance front-end development with Core Web Vitals optimization * React & Vue migrations from legacy stacks (AngularJS, PHP, jQuery) * Modern, scalable component systems with Tailwind, Radix UI, and reusable patterns * Next.js applications with SSR/ISR, serverless APIs, and Firebase integrations * Dashboards, analytics interfaces, and data visualizations * Clean architecture, clear communication, and dependable delivery Why Clients Trust Me: ✓ Senior-level engineering judgment ✓ Strong UX and product understanding ✓ Proven performance improvements (27% gains, 95%+ web vital performance scores) ✓ Experience building for millions of real users ✓ Clear timelines, proactive communication, and reliable execution If you need a front-end engineer who brings speed, clarity, and senior-level technical expertise, I’d be glad to help you build something exceptional.