Big Commerce Expert Required to edit Dropdown Menus

We have a website that has been completely finished. The only thing we need finalising is the dropdown menus at the top of each category page. We want to be able to filter through the products on each page using dropdown menus that are based on the categories, sub categories etc. The basics and skeleton work has been done already. We now just need someone to fine tune the filtering process of the database. You MUST have previous experience with big commerce. Anyone who applies without previous experience will not receive a response back.