It sounds like you missed an opportunity there. Just because someone has XX years of work experience doesn't mean that they know a particular technology stack.

It sounds like you missed an opportunity there. Just because someone has XX years of work experience doesn't mean that they know a particular technology stack. Perhaps this could have been a great opportunity for you to teach that person your skillset, while learning things from them in return. The best mentorships are bidirectional. While humans are growing up, we're accustomed to view our "elders" as our superiors in all respects. Childhood teachers encourage this view. However, at the point when you enter the workforce, in my opinion you should set these ideas aside and treat everyone as a peer; and keep your mind open to the idea that both people may have something to learn from the other.