I completed a CodeSignal online assessment and heard back from the Robinhood team after a few days. These were pretty typical algorithmic problems; none were too difficult, but the assessment is partially graded on speed.

I then scheduled an on-campus interview where I was asked to solve a few algorithmic problems (required greedy/DP solutions) and then make some code thread-safe.

I was subsequently invited to interview on-site. My on-site interview consisted of one hour-long round of whiteboarded algorithmic problems, which were fairly difficult, and an hour-long programming session on my laptop, which was relatively easy.

I received an offer the following week. I ultimately did not accept, but had an overall pleasant experience.

Reverse link list with recursive calls.