It means to work together.
collaboration
Collaborator .
Engels
In MS Word, final markup allows you to see the changes that an editor or collaborator has made to your documents. It also allows you to see any comments made by a collaborator or an editor.
backstabber, caballer, collaborator, colluder, highbinder, plotter,
a collaborator
accessory, accomplice, associate, collaborator, colleague, friend, helper, partner
Collaborator - novel - was created in 2003-09.
Some choices: partner, helper, backup, aide, accomplice, supporter, collaborator, accessory
quisling
It actually means this. Someone who works jointly on an activity.
There are many good places to find a code collaborator. One can find a code collaborator at popular on the web sources such as Smart Bear and Code Ranch.