I was contacted by a recruiter on LinkedIn. After a brief interview, she offered me two choices:

1. The usual recruitment process, involving a technical screening, an on-site interview, and a decision.

2. Attend a mobile engineering hiring event at the end of the month, where I would do a longer on-site, but skip the phone screen.

I went with the latter option.

She then asked me a series of iOS questions, and scheduled me for one of the three dates of the mobile engineering recruitment event.

The event was about five hours, and consisted of several one-on-one interviews. (Preparation materials were sent well in advance). There was a behavioral interview, an iOS coding challenge, a data structures & algorithms whiteboard interview, and iOS app architecture / design interview. I found the DSA interview to be the most challenging.

Describe how you would architect Uber’s iOS Rider App.