Your experience is slightly out of order - Grindr should be ahead of Expedia. I don't think that's the reason entirely, though, but as a recruiter I'd tilt my head and squint at that.

My advice is to find someone you're connected with at Airbnb, even if its a 3rd degree connection, and see if they'll refer you.

Also have you done a diff between your resume and the job descriptions? If you've applied to multiple, it might be useful to see if there's a common denominator between them that could explain why you're not getting a callback.

Lastly, don't stress about one company :) They're probably just inundated with apps and its taking forever to get back to people.