Two Sigma Senior Developer interview questions

Just terrible! 0 stars. Summary: scheduled a full day of onsite interviews 2 weeks before. I took a vacation day to do it, then they send an update at 8:30pm the night before that there's only 1 round. I was so confused and couldn't reach anyone for an explanation. There's no sincerity to hire, no follow-ups on the explanation nor rescheduling. This company is dead to me. Here are more details: 1) The onsite interviews were scheduled and confirmed for about 2 weeks in advance. It was a full day of interview rounds, so I took a vacation day from my company in order to make a good impression. Then come 8:30pm the night before, I got an automated email stating that there is only 1 round of interview at 5pm instead of a full day of interview. I emailed back but did not receive an explanation. Summary: I wasted a vacation day (I could have used it to spend it with my family and friends on an actual vacation!) in hopes of conducting a full day of interviews but all cancelled but 1 of them last minute. 2) The interview was also not what I expected. Even though the recruiter said it will be a technical interview session and provided me a HackerRank link, the interviewer did not use it at all and just chatted about my prior experience. Worse, he picked on the work experience I just started this June (2021) for almost 30 min, even though I had extensive work experience in Bloomberg for 7.5 years (Yes, he'd rather talk about the role I barely had 5 months to get into rather than the rest of the 7.5 years). Then he proceeded to ask me very specific C++ questions in which I used over 4 years ago.

I was recruited over LinkedIn for a senior engineer role. The HR agent scheduled two interviews over the phone. Two times no one called me. I don't recommend interviewing here.