Drupal 7 | Associate dynamic user to a content type I have a  content type "Article", with a field "author". 

Is it possible to assign users with "writers" role dynamically with this field ?

The goal is to display in the article node, a link which redirects to the writer(user) profile.

For example :

-Article Title

-MM/DD/YYYY

-Written by : randomWritter (dynamic link)
References module will enable you to do that.

It allows you to create fields and associate them with existing content/users on the site. It also features integration with Views so you can have more complex logic to filter out the available options.
The field can also be displayed as an autocomplete.