Revolut Senior Software Developer interview questions

I was interviewed for a Senior Software Engineer position at Revolut. I was rejected after the second step. The first interview was with a recruiter, the communication was not great, as the recruiter accent wasn't the best, made it very difficult to follow. I was asked some technical questions by the recruiter, whom clearly didn't understand if my answers were correct. Second stage was with a Senior Engineer. I've done what was asked, even performed some improvements asked by the engineer. But in the end got rejected, no proper feedback was given, just the ordinary email rejection template. Honestly I feel that the engineer didn't want to hire me for some other reason as everytime, the engineer identified some limitation I was able to solve it. I think maybe in revolut, people are just expected to know the interview in advance and prepare for it like a robot instead of doing it in an iterative way. Still I think the questions are interesting and the problem was interesting.