First round was a Leetcode easy challenge with a lovely kid who was bright and engaging. Next was a virtual on-site, starting with a coding challenge, another Leetcode easy. The interviewer had a lot of latent anger, and ignored me and multitasked through most of the interview. Behavioral/experience interviewer seemed distracted and may also have been multitasking; asked a lot of weird questions, either intentionally or due to experience is in a different niche. Third round was architecture, the whole point of which apparently was to funnel me into a gotcha, and then do a 10 minute monolog about an arcane problem their team had solved and how brilliant he was. Final round was more Leetcoding with someone with depression issues. This person talked at length about the same arcane problem the previous one had mentioned, so they were pretty proud of that one. Amusingly, I got dinged once for suggesting a cloud-native solution where I could have installed the software directly, and later got dinged for suggesting installing software directly where I could have used a cloud-native solution. Both were the same type of tech. Takeaways, Datadog is modeling itself after the FAANGs, but has to hire people who like problem solving for its own sake and aren't concerned with the lack of a meaningful big picture. Because of this business and marketing patterning I worry that they'll want to, and have to, do mass layoffs in the next few months.