Reached out by recruiter on LinkedIn. Had a phone interview and went directly onsite in SF. The process was smooth and the communication was great. But the day was very long and I had 4 technical rounds, 1 pm round, 1 hiring manager round and 1 hr wrap-up. I put in neutral mainly because there was one particular round very frustrating. It was not a typical algorithms round but a round where I was asked to implement a card game. The interviewer looked very young, which was not a problem, until he showed some signs of being either unprofessional or impatient by checking out his phone under the desk. And since it was the first round after lunch I was hit by food coma and the coffee made me want to use bathroom very much but he wouldn’t allow me to use the bathroom said I could go after I finished... so I had to hurry and thus I had some bugs when I was compiling it for the first a couple of times and he somehow also showed impatience and even arrogance by saying “ oh I can do this very fast but you have to do it”. I finally got it working and also the follow up problem but it was indeed an unpleasant round. All other interviewers were professional and respectful.