Design a Banner

I'm looking for someone with experience in interface design or coding within the Bigcommerce platform. I do NOT need a designer, just someone who has done work modifying the template or modifying code within bigcommerce. We will work together with a graphics designer to make adjustments to an existing template. I just need a programmer who can communicate effectively and understand various layout techniques. My tasks will include simple instructions such as: 'add mouse over pop up to..', modify size of this image, modify size of sidebar...etc. That is it. No design, no graphics needed, our team will work on that part. For the Current project, we have a set of 7-10 changes that need to be made. An agreed budget will be set for each small project. This will be ongoing as our website will constantly need updates and modifications. Each set of changes will be billed separately Please show me any previous work you have done on bigcommerce and list any relevant skills.