"So many recruiters are looking for senior developers like me to join their early stage team and to do development and assist junior devs via knowledge sharing."

What I have encountered is that everyone wants to hire senior developers, but no junior developers, so your "senior" role is the same as that of a junior developer.

I always ask what the team structure is during the phone screen. If it is all senior developers, which is becoming the norm, then I stop the interview process. You will be the defacto junior developer as the newbie on the team.