Juan Vivanco
Full Stack Engineer (Frontend oriented) — I build products people love to use.
10+ years shipping interfaces at companies like Sephora, Alation, and UMass Global. Based between Portugal and Ecuador — working with global teams. I combine deep frontend expertise with AI-augmented workflows to move fast and ship quality.
Selected Work
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MSA World
Senior Full Stack Engineer
Sole senior engineer on the membership platform for ~3,400 appliance service companies across North America. Mobile-first document library, webinars, training, and hotline on Next.js 16 and React 19.
Desk AI
Senior Front-End Engineer
AI platform automating real estate contracts for 50,000+ transactions. Built conversational AI interfaces with streaming responses and document analysis tools.
UMass Global
Principal Full Stack Engineer
Led a full site refactor and modularized complex tools like the Time Cost Calculator and Program Finder for the university.
Sephora
Senior Front-End Engineer
Built the Live Beauty Chat from scratch — a progressive web app for real-time customer conversations with Beauty Advisors.
Alation
Senior React Developer
Co-created Fabric, Alation's design system — guidelines and reusable components powering their data catalog platform.
/nowWhat I'm up to
- Building AI-powered real estate tools at Desk AI
- Exploring AI-augmented dev workflows with Claude Code and Cursor
- Mentoring frontend developers through Proxify and Andela
- Living between Portugal and Ecuador — optimizing for sunshine and focus time