Additional functions for a website

I need a developer to make additions to an already existing project. 1, Add country/category on articles menu and get->show articles by country, category, sub-category. 2, Update info of the articles: 3, Create function do/did. 4, Create verify function. 5, Create User page: - Articles created, - Articles liked, - What the user do/did, - What the user verified, - All of articles the user contributed to. 6, Update home page like facebook: - When user not yet login, the home page will redirect to register page. - When user login, the home page new arctiles in user's country, articles in category that user Flags, articles they follow... 7, Update register user and add field country for old users. 8, Update create article and add field country for old articles.