Any reason (I can't think of) why they might choose such long URL's for the job listings rather than something short like /positions/air-bnb/ruby-developer-need

Any reason (I can't think of) why they might choose such long URL's for the job listings rather than something short like /positions/air-bnb/ruby-developer-needed/? Just makes the URL's a bit more readable especially if we're sharing them about :)