CSS Programmer needed for Big Commerce Setup of New Website

We are a small independent motorcycle clothing, parts and accessories retailer who are developing a new online store. We have identified that Big Commerce is the platform of choice and we need a programmer highly proficient in CSS programming to help us turn Big Commerce's standard templates into something more in tune with our current aesthetic. We need an individual who is capable of implementing simple changes such as background graphics, header & footer graphics/links, logo insertion and the insertion of a product carousel. There may also be some work to complete on the merging of our payment gateway into the Big Commerce System. This is the first part of a raft of work which will be required and whoever is successful should bear in mind that future work is all but guarantee'd. We will expect a very high standard of work based on our current sites look and feel and will expect the individual chosen to be highly proficient and extremely creatively minded able to interpret our brief and offer feedback and suggestion and implement those changes quickly and efficiently.