Joomla Extension Customization

Hello Freelancers, We are looking for an experienced Joomla developer to customize our website ([login to view URL], a week ago launched) that runs social pinboard joomla extension (a pinterest like extension, a product of [login to view URL]). The customization works include removing and adding some features such as adding facebook comments, adding new text box field for pin title, adding google adsense space, adding follow me buttom in the home page, adding new likes and repin notification, repositioning social shares icons (facebook, twitter), enabling users to change their background picture (profile), enabling users to hit Enter Buttom to make paragraphs in the pin description, removing default comment system, removing board features, removing gift [login to view URL] project should be finished within 4 weeks or [login to view URL] read the detail description of customization works with screenshots attached before bidding. According to Apptha staff, The extension (social pinboard) is open source one, BUT please double check it if this extension is 100% open source or not. I have a website reference [login to view URL], you do not have follow exactly the appearance of that website. Most the features of the reference website has been available in social pinboard extension. Please note that, there will be continuing customization works I will post here again, If you can do those works very well, then it is highly possible that I will hire you gain to add new features of the same website. Thank You