The main supplier in the area I am working is a huge US company with many different divisions, including a software engineering one. I am working with more a co

The main supplier in the area I am working is a huge US company with many different divisions, including a software engineering one. I am working with more a couple of dozens people that have "Senior", "Staff", "Principal" and "Engineer" words in the title, in combinations of 2 or 3 of these words, but it totally makes no sense to me if I am looking at the expertise, effectiveness of their work and the influence/decision power they have: they are all skilled workers with fancy but meaningless titles.