I am a solo non-technical founder who hired and fired around 10 developers on a freelancer platform before finding the gem of a developer who single handedly completed the platform. Unfortunately, after a year he has left and now I'm struggling to find a replacement. The web app is still running fine, but further development is stalled. I'm wary of giving access to the entire codebase to the would be new hire. And I being a non technical person, have no idea how to give only partial access to my developer. Just rambling after reading the title. Sorry!