Lyft Infrastructure Engineer interview questions

I spoke to a recruiter after applying online. We setup a meeting with a hiring manager at my request to ensure the role would be a good fit. After our chat I was asked to skip the phone screen and come in for an on-site loop. I was told to expect a laptop coding exercise and two design/architecture exercises. The laptop coding exercise was the best format I've seen. I was given a printout of the task and how I would be graded. I was then given an hour, unsupervised, with full internet access to implement a solution on my own laptop, plus some time to ask questions and discuss my solution. I was told I'd be graded by both my interviewer and an engineer who had never met me. My exercise was less 'infrastructure' focused than expected, but not an unfair ask. I knowingly selected a suboptimal data structure due to my unfamiliarity with the optimal one in order to ensure I produced working, tested code on time. My next interview turned out to be whiteboard coding rather than a design/architecture exercise. I absolutely tanked it, despite it being a simple problem. Finally I was given a fairly broad system design/architecture question. I felt I offered a less concrete solution than I'd have liked - the interviewer was friendly but hard to read. My recruiter took the time to call me back within 48 hours to let me know they did not want to proceed. Despite disregarding my performance on the unexpected whiteboard interview, my code from the initial exercise was not up to their standard. Lyft seems like a great place to work, and while I'm disappointed I didn't get the offer the interview process seemed a very fair and well organised one.