It varies. Co-founder's are "supposed" (according to YC) to have a 10% or larger original stake in the company but people will throw the title around anyway. Li

It varies. Co-founder's are "supposed" (according to YC) to have a 10% or larger original stake in the company but people will throw the title around anyway. Likewise founding engineer could be an IC there from the begging with several % in stock or it could be a meaningless puff title.