Super Micro Computer, Inc. (Supermicro) interview questions

My experience is a match so I received an email by their engineer a week after applying. 2 phone calls + 5 rounds on-site interview. The first round was a pen and paper test, and the rest were writing algorithm on white board or paper. I answered every problem during the interview and the follow-ups. They are in pressure and really wanted me to join. The engineer team gave me a strong hire decision to move on the process however their HR ghosted me for a month after the initial call. Rejected me with a ridiculous reason. if you read this: 1. The HRs at SMC are totally aswipe. They never show up until you finish the entire interview process. 2. They only contact you through LinkedIn message. super unprofessional. 3. no 401 K match 4. They barely reimburse interviewers for on-site interviews. (they paid my flight tickets though but the airbnb) 5. Don't give them the number first until you get the offer. Even it's within the salary range on the job description. Instead of another negotiation phone call, they would rather ask the engineer team to interview more candidates instead.

I interviewed with three team members. One of the only asked questions. The second had me code an easy problem from Leetcode and implement a function in React.js. The last interview was a technical interview and I was asked to solve a few medium and easy problems.