On the first step of the technical interview, it went great with two different engineers. In the second step, I decided to do a live coding interview.
For the first 10 minutes, I solved a pretty straightforward problem with a simple and flexible solution. But unfortunately in this meeting, there was one specific dev that probably was a mid-level engineer who, from this point on, decided to undermine my chances. On this specific first problem, he proposed a solution much more limited and dependent on the input. I've undertood his solution and coded it without creating much noise over it. So we moved on.
During the rest of the interview, this mid-level engineer monopolized the questions with very specific questions that were pretty unusual for a senior interview. My feeling is that this guy was just trying to appear more senior in front of their colleagues.
Other examples of his behavior were: He asked a question about how I could update 100.000 entries on a DB. I proposed scheduling a Job and he insisted that it could be done immediately without locking using batches. I disagreed and said that using batches would still lock the database according to the batch size. Another group of questions was related to callbacks and very specific usage of them, when I asked back if they were using it frequently he said no. Besides that, even when answering correctly he was always shaking his head with disdain.
That's a shame because the company seems nice and also the other two engineers.