Field with author link in node i am building a website where many users will be able to add specific content. I want each content-node to have a link to the the authors profile page. I am using profile2 for users profiles and the alias of link in the node must be the "Company Name" field and not the username.

How can i achieve this?

Thank you!
Why don't you just use Views, and place that view towards the bottom of the article or that content type? 

The views will be based on a user relationship with the node uid (the author's user id).

All those fields you require you can add to the user profile (admin/config/people/accounts/fields) - Company Name, Byline etc etc? And then display them via views.