Applied with a referral and heard back within a few days. I had an informal chat with the recruiter, and within another few days, she emailed me to inform me that I'd be moving forward with the technical interview.

The technical interview was one hour long, and I was given most of that time to solve an upper-level, LeetCode medium problem. Although I arrived at the brute force solution in short order, I was unable to implement the optimized solution within the given time.

I think that although I had prepared pretty hard for the technical interview, I had just fallen short of where I needed to be. Next time, I'll be sure to prepare just a little harder/longer.

A generic, graph-related question that had an easy-to-see brute force solution and an optimized solution that required an advanced algorithm.