Mockup design for a screen on an application

We are re-designing our application and we are looking for someone to re-create a single screen on it. The work is to create a mockup, with your own ideas, starting from what we do have now and taking it to the next level.

You should expect the web application to run on either a Desktop and a Mobile device. We'll provide you with references of the design we like and screenshots of what our app look like right now.