Being the license holder, you are able to manage all licenses so you can safely remove you from the assigned license and not use up that space. Simply log in to your account
and visit the “Product Subscriptions >> Manage Licensed Users” section:
Then hit the “X” button across your name to remove yourself and hit “Assign User to license” to add your developer colleague:
Repeat the same process if you need to replace one of the current developers with someone else.