Graphic Designing for e-commerce business

I am in need of a graphic designer who can help me improve the user experience on my e-commerce website. The ideal candidate should have experience in creating banners, campaign creative, and emailers. While I do not have any specific branding guidelines, I do have a preferred color scheme that I would like to be incorporated into the designs. The main objective of the graphic designs is to improve the user experience on the website and drive sales