I there, I have a colleague which is trying to move to emacs and he is using Spacemacs

he is missing the back to file functionality on Intellij and I was wondering if somebody has a way to jump back and forth to buffers

we found https://github.com/rolandwalker/back-button

but unfortunately it does not work in Spacemacs

it miiiiight be this one https://github.com/gilbertw1/better-jumper/blob/master/Readme.md

@richiardiandrea SPC TABtoggles to the previous buffer, allowing you to switch to the previous file you were editing. The cursor should be on the same place as when you left SPC p atoggles between source and test code, SPC s a toggles between repl and source code. The first two come with Spacemacs by default, the third is Clojure specific. There are some other ideas at https://practicalli.github.io/spacemacs/working-with-projects/ We also recommend using the Spacemacs develop branch at the moment. Feel free to join the #spacemacs channel for Spacemacs specific questions

Your colleague may also find markers useful for jumping around https://practicalli.github.io/spacemacs/navigating-code/markers.html