As somone who started the same day as another junior developer in my first job, I second this.
Just having someone who's also junior who you don't feel any shame about asking stupid questions to is killer. You shouldn't feel any shame either way, but that's sort of one of the things you learn transitioning out of a junior role.
I also had the experience of starting out a job with someone with almost the same level of knowledge as me and I can testify it was a brilliant idea. The integration into the team/company/stack is much smoother when you have buddy that is at the same position as you.
Just having someone who's also junior who you don't feel any shame about asking stupid questions to is killer. You shouldn't feel any shame either way, but that's sort of one of the things you learn transitioning out of a junior role.