Big Commerce or EKM Programmer Required

Looking to move our current store to either of these platforms. We need a programmer that has in depth knowledge of either platform (preferbly Big Commerce but we can work with either)

First project will be to adapt the variant choices into conditional, i.e. we have 2 dropdown menus, first menu you choose manufacturer, second menu display products ONLY by manufacturer selected in first menu.

This cannot currently be done in either platform so please don't waste your time looking :-)

We're are looking for someone to work with longer terms as the need arises and if you respond you MUST have knowledge, we don't want anyone saying they'll take a look and see what they can do....you must know already :-)

Budget is flexible depending on work required, price given is just to allow posting.

Freelancer must be willing to work through PPH for project payment but we can discuss on Skype, please don't ask to work outside PPH as we will not. We also need someone who can work within GMT timezone or at least be available to talk 9-5.