Joomla Virtuemart Extension Developer

Hello we need a partner company to develop our joomla Virtuemart extensions. We need to develop many features with external core extension. NO CORE HACK , so please skip this project, expecially not ask for core hack after winning, or this will lead to negative feedback ( due to bad past experiences). General rules expressed in attached files. The script to update the extension will be paid too. Extension will work mostly in backend to help our company selling online. Extension requested: - Product filters with group labels features - Customer managing - Product backend managing and so on. For any question please contact us. Thanks