Bigcommerce Checkout Page Customization Expert -- 2

We have a Big-commerce website, we are looking for an expert developer, who can do some changes to our Cart page layout & checkout page. Our old developer is unable to do this task for us, so we want to outsource this, for an expert developer it's not a long time work, We just need an expert who can do this quick & on time. We are always available to discuss the task in detail.