Design a rate limiter.

"The interviews are scheduled over 2-3 days so the process is quick. They have a phone screen, DS round, DS with AI, System design and Hiring Manager round."

"few stages: an initial recruiter conversation, a technical screening, and then a set of onsite or virtual interviews. The technical rounds typically cover coding/DSA, system design, and behavioral or leadership-oriented questions. For a Senior role, I’d expect system design and demonstrating technical leadership to carry significant weight. I’d also prepare for Googleyness/culture-related questions"

"My interview panel was for a specific team and not a general hiring pipeline. 3 rounds technical + behavioral. First 20 mins behavioral then technical. Last round was bar raiser. Everything went good for me, few questions were new like "experience with gen ai", rest everything was traditional LC + LP based behavioral."

"Timeline was smooth and interviewers were friendly. Turnaround was quick. and Communication was great"

"I originally applied to a different xAI role, and an engineer on that team redirected me to the Senior Safety role after a quick intro call. From there I did a hiring manager screen, a practical technical phone screen, and then an onsite in Palo Alto with one coding round and one hybrid coding/system design round, plus a short follow-up call after. The actual questions were much more practical class-design problems than LeetCode, which matched a broader trend I was seeing, but xAI gave almost no useful prep and the process felt pretty ad hoc. The onsite was easily my least favorite one because the whole thing started with armed guards, bag checks, and escorting me around the building, and then one interviewer spent a bunch of the coding round on his phone. I got rejected afterward with a vague note about a shift in prioritization of open roles, so I still do not know whether the role actually changed or if that was just their way of saying no."