Yep, Evan is my cofounder! We started talking about building collaborative creative tools using WebGL shortly after he built this demo in an afternoon during summer 2011.
Shameless plug: if anyone is interested in working with us on Figma, we're hiring. https://www.figma.com/careers#jobs
Didn't know Evan is co-founder of figma.com - maybe that's why the app feels quite snappy in the browser.