[six2seven]

Try to release this tension a bit, stay with the team, adapt, work hard and observe. You have now perspective after only one month. Revalidate it after 3 and then after 6 mo. And don't forget to not stop improving and adjusting.

Your story reminds me a bit of mine. I joined at some point a very skilled, but small team of engineers working on a product from machine vision area. Those chaps were brilliant engineers, many with significant achievements in academic / coding championships. They were truly passionate on what they were doing and were really good at it. And I felt that I was 'just another regular dev' who cannot even compare with most of them, but who also liked coding and the problems domain.

After first month working there I was quite stressed, as was I constantly seeing the gap in my skillset, but I tried hard to manage. After 3 months, I was slowly 'getting there', working on the full stack, but still had the impression of vastly underperforming vs the rest of the team. After 6 months I finally got into the rhythm and started being given more senior and responsible tasks. It took me a while, but it was really worth it.

Although today I am working in another place (and country), but, really, working with that skilled team was one of the most productive and self-improving times in my career (and I still kind of miss these times and the team).