They have an Android app, an iOS app, driver management system, fleet management system, ride tracking system, ride scheduling, navigation system (not sure if t

They have an Android app, an iOS app, driver management system, fleet management system, ride tracking system, ride scheduling, navigation system (not sure if this is 3rd party or in-house), payment processing, profile system for both riders and drivers, price calculation system, and probably a bunch of other stuff in the background. All this must work correctly and reliably in the 400+ cities they're operating in. To me at least, 20 developers is not enough to develop and maintain that many interconnected systems. I would say 100s at the very least.