The standard onsite gauntlet that FAANG companies are famous for! It included 2+ coding rounds, a design/architecture round, and a behavioral round.

I did better in some parts than others, but overall, I thought every question was fair. There were no 'gotchas' or totally unexpected questions.

I was most impressed with working with the Facebook recruiter. He was very organized, prompt, kept me in the loop, and was overall very helpful in informing me what to expect and how to prepare for the interview. Even after the onsite, during the hiring decision, he kept me informed of what was going on every step of the way. It felt like Facebook had a very well-defined recruiting process, unlike some of the smaller startups.

You know, the standard coding question with a naive solution of O(n^2) that can be solved in O(n) using more memory.