Face-lift design and responsive pages for food ordering website

We have online food delivery website which is develop in wordpress. We are not completely satisfied with the look and feel of the frontend. We believe the site can look better than it is presently. And our main concern for this website would be responsiveness. We are therefore seeking the services of a professional web designer to give the site the extra touch/feel required, including the responsiveness of the web pages. The successful candidate must be a professional with WordPress experience, and must have strict ATTENTION to DETAILS. Please come up with the plan how you facelift the website, & why we consider your bid. Also send samples of work done in your response. We will send the link to the website only to serious bidders.