The way I see it is that the team was working on the payment system. She may well have specialized on some scaling aspects but that does not preclude her workin

The way I see it is that the team was working on the payment system. She may well have specialized on some scaling aspects but that does not preclude her working within a team having responsibility for building or maintaining the payment system. Considering that Uber has a micro services architecture the teams will be organized vertically along end-to-end functionality and not along the architectural layers. In that way the story is consistent with what is publicly known about Uber IT.