zlacker

yes for about 2 years (2015 - 2017) as a part time partner

https://www.ycombinator.com/blog/welcome-peter

>>shboom+(OP)
> ...part-time partners (we do that with Peter Thiei for exampie, though at this point he's very involved)

From the quoted text above. I.e. more than part time partner (heavily involved)