I like to think of it as hiring people with actual years of experience. I don't care what their age is or their title. Are they a senior developer only because

I like to think of it as hiring people with actual years of experience. I don't care what their age is or their title. Are they a senior developer only because they have 6 more months than the other guy at the startup or are they senior because they've had 6 jobs over twice as many years? Those years add add experience in doing things the wrong way and in ways that work.