Born in Lanรบs, Argentina, Guillermo taught himself web development and English by reading Linux documentation and participating in open source communities at age 11. By 16, he was consulting for international software firms in Switzerland and the US.
Guillermo co-founded LearnBoost and created Socket.io, a pioneering library that enabled real-time bidirectional event-based web communication. In 2015, he founded Vercel (originally ZEIT) with the mission to give frontend developers a delightful, instantaneous deployment workflow.
He spearheaded Next.js, the React framework that has become the universal standard for modern web applications. Today, Vercel hosts top platforms like TikTok, Notion, Loom, and OpenAI's ChatGPT web interface.