Jon Koon is a seasoned software engineering leader with 14 years of experience building full‑stack web products and leading engineering organizations at both startups and large tech companies. He co-founded and served as CTO of Charityvest, single‑handedly shipping the MVP and growing the product to process over $50M in donations while building the backend, payments plumbing, and a React design system. At Twitter he was a key architect and tech lead on the React rebuild of twitter.com and the UI foundation/design system used across teams, and more recently he drove revenue‑impacting platform features at HubSpot for objects, properties, and associations. Jon combines hands‑on engineering with people leadership—having scaled teams from single digits to 40+ engineers—and a knack for pragmatic architecture such as event‑driven microservices and graph‑based funds flow. Based in Belmont, MA, he blends startup grit with enterprise delivery, prioritizing user delight, accessibility, and robust operational practices.
14 years of coding experience
16 years of employment as a software developer
Y Combinator
Computer Science, Computer Science at Georgia Institute of Technology
pico-8 game for ludum dare 42 - Play it in your browser!
Contributions:5 PRs, 47 pushes, 8 branches in 27 days
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