I applied via LinkedIn job search and was then contacted by HR. The HR representative was very pleasant and asked a few questions. Following that, a phone screen was scheduled. The interviewer was not the hiring manager as indicated in the job profile; instead, he was a senior software engineer on the team. The interviewer initially canceled the phone call five minutes before the scheduled interview time. The next day, I inquired about the next steps, and he suggested 11 AM the following Monday. At 11:20 AM the following Monday, I emailed him to ask if he would be calling. He replied that he had completely forgotten and would call in the afternoon.

Finally, we were able to speak. The first question he asked was, "How to get a concise summary from a user's Specialties?" This was essentially a keyword selection problem. I suggested a common approach. He then asked for details on how to implement it. I explained the algorithm and suggested possible software languages. He then asked about a project involving a recommendation system listed on my resume. He inquired about building a data matrix. I was momentarily stuck, as it had been quite some time. He then ended the discussion and closed the call.

I sent him a thank-you letter afterward, also mentioning the data matrix question. After a few days, I received no response. I contacted HR, and they informed me that I had not been selected.

Total technical questions related to their own application. There were no programming or behavior questions.