It's a very simple idea, but it may help the user experience.
When I enter on a company's profile, click on "contacts" and select one of the people registered there, how do I go back to the list of contacts? I have to return to the page of the company and then re-click on "contacts". It would be easier to have a "go back" button to link back to the contact list page from the person's profile, I think. One click instead of two!