Uber is not that difficult. There's work for hundreds of developers between the few products, the localization for tens of countries with different language/currency/culture, and maintaining the main applications in working condition 24/7 at global scale. That's about it.

They have thousands of engineers sitting idle or making pet projects, struggling to justify their existence, as regularly attested by internal employees when an article pops up.

I never understood why Airbnb (and even Uber for that matter) were seen as prestigious tech places to work at.

Expedia, hotels.com. booking.com and most airlines are handling more requests than Airbnb in more challenging environments.