Don't waste your time with this company. My interview experience is quite similar to the person below. I had two rounds of virtual code pair interviews after an initial talk with the recruiter.

After the first round, they told me that they would continue further for the Senior Software position, to which I said I was OK and requested to be given a chance to improve my rating to still be eligible for the lead position.

Second round, my code was not complete by the end of an hour, so the interviewer asked me to email him the code in the next 15 minutes. I was not really comfortable with the dark background of the code pair editor, its IntelliSense which sometimes wouldn't work, and jumping up and down to refer to the code definitions. But I completed the code and tests and emailed the interviewer in 15 minutes. It was all working.

But no reply from them, and after checking a couple of times, the recruiter comes back with only lead/manager positions they are pursuing, and senior positions are on hold. It was a lie; they opened a new senior position after that, and my friend was contacted for it.

I don't understand what the acceptance criteria are if correctly submitted code doesn't get you selected. I think interviewers are too judgmental of candidates. They need to understand they are not hiring robots; we are humans and are imperfect. Guys, you are not Google or Facebook!

Like the earlier reviewer, I had to ask the recruiter about feedback. He never reached out, even if the feedback was positive.

Implement multi-map dictionary interface, define complexity for operations, and implement extension methods.