Square does a really good job on the process. E-mails are promptly replied and recruiters are very friendly. Two initial phone interviews with developers were set up very quickly. They were very friendly and we got the problems solved in time and efficiently. After that I was invited to the SF office for the on-site. 3 pairing interviews with coding and other interviews focus on more on other aspects of the company and the candidate. Most interviewers were very friendly and professional. However, here ends the good story. A coding interviewer let me know that he is having a bad morning. The coding problem itself was not very complicated, but I could feel he is not particularly enjoying to interview. I felt as if I am responsible for his bad mood. He was constantly looking at his watch and counting the minutes instead of actually discussing with me the problem and the approach chosen. He seem to have no interest whatsoever interviewing or assessing the candidate. Another thing I was very concerned about was the actual "pair programming". I could tell they use it for interviewing purposes. Once hired you seem to rarely pair with someone. Thus the interview is more described as "code while someone is watching over your shoulders and making notes on every mistype you make". I guess "pair programming" sounded better than "technical interview". But in this case there is no difference. My final thoughts and advice: If someone is 'sharing' his unstable mood with you on the interview, there is definitely something wrong. This was a very BIG WARNING SIGNAL for me. I personally think Square is still a good company, but maybe they should focus stronger on people they choose for the interviews than replying feedbacks on glassdoor.