Fifty design people? It's going to be at least an order of magnitude more. (To confirm, did a LinkedIn search for Product Designers at Uber. 521 results. Pretty close!)

I work at tech company you've probably heard of (consumer-focused, international, relatively large scale, though probably a couple orders of magnitude smaller than Uber). We have ~200 engineers (client, backend, ops/infra, data eng, ML, etc). We have ~15-20 designers. We're international but we do very little feature and/or design customization per market, beyond localization, unlike Uber, which does customization even for different cities in the same state, let alone separate countries!