Drupal Developer Required for existing website

We already have a Drupal website for content creation like books, quizzes etc. We want to add e-commerce to the website as well as revamp the UI/UX . Followingare the high level requirements. We can share specific details during finalization of the proposal. --Integrate Commerce so that one can sell the created content (e.g. books, quizzes) through the site. --Create views for user generated content which should be responsive (viewable across devices). --For paid content , create preview (where only part of the content is visible). --Create better UI/UX responsive design as per current design standards and make it more user friendly. --Create relevant images for website --Integrate social sharing of user generated content(Facebook, Twitter, Pinterest, Google+) --Site should be able to collect user level data based on browsing pattern and other activity and send appropriate notification/email based on predefined use cases --Make the site secured from spammers, set appropriate permissions Skills required: Drupal, Php, Css, Javascript, Photoshop Strong Drupal theming and module development Solid front-end JavaScript/jQuery/HTML5/CSS Programming Languages Required: php css Software Frameworks that will be used: drupal Other Skills: ui-design html5 javascript css3 twitter-bootstrap API Integration Required: Social Media, Payment Processor