Talk with recruiter for 30 minutes. 1 hr long interview with hiring manager. Hiring manager spent a very long time bragging about his achievements at another [big name company]. Then he asked me a design question. I described a great solution to the hiring manager's design question. Hiring manager was unable to comment because he does not know very much machine learning. I asked him what he thought of my solution. He was speechless and asked some questions that revealed he does not know very much about machine learning. And when time was up. He yelled that time was up. I took a few seconds to clarify a question he had earlier. He continued yelling, saying "Did I ask you to talk more? or did I ask you for final questions you had for me?" Not only was he technically inept, he was very impolite and he started yelling in the middle of my phone screen. They rejected me without even having the technical skillset to fully evaluate my solution. I am deeply disappointed in this hiring manager.