Received an email from the hiring manager to schedule a 30-min phone screen then had a follow up phone screen. Process after that was to be brought on-site. My experience... The initial phone screen went well and the hiring manager expressed enthusiasm for my candidacy. We briefly touched on my background, why I want to be a product manager, and my interest in Stamps.com and knowledge I had. After concluding the interview, the hiring manager told me he would be in contact with me to schedule an on-site interview to meet other members of the team. The hiring manager was easy to talk to and the conversation went smoothly. This is where the experience took a turn. A couple days after the initial phone screen, I received an email requesting that another phone interview be set up in the next 2 days. I was a little disappointed as I thought it'd be an on-site as discussed in the initial conversation. Got on the call with the hiring manager again - he wasted no time this go around. Jumped straight into the question which was a brain teaser type question. I was completely taken aback as this question wasn't an estimation type question but rather a recursion type question. I only realized that it was a recursion question because I had taken programming courses in my undergraduate classes. However, the positioned I interviewed for was not a technical PM and the listing did not specify a CS requirement or background (although as always, nice to have). Embarrassingly, I spent 10 minutes on the phone with the hiring manager discussing my thought process. After arriving at a feasible solution, the interview ended and was told an email will be sent for next steps. Obviously, I did not get the position. I felt cheated that I was told I'd be moving on for an on-site and that the deciding factor for my continuation in the process was whether I could answer an algorithmic question for a position that did not require a CS background. These questions are not in anyway indicative of being a successful PM, so it's frustrating to see them still around.