Enhancement to User Management module of website already in development

Project Description Social Media Website, voting on content. Developer has to be an expert in Mobile first approach. Being developed as mobile first approach so it can be wrapped in Mobile app later on. Minimum 10 years experience in ASP .Net. Developer should have good experience in MVC, Entity framework. Minimum 2 years in Angular and Bootstrap. Developer should be able to demonstrate, experience and evidence of websites where below features were coded and implemented a) Login with multiple Social Media accounts and local Sign up b) Managing a unique user in the database, linked to various Social Media accounts c) Sharing content through various Social Media accounts. d) Implementation of user comments functionality (not 3rd party) , but custom built. e) Interacting with 3rd party APIs to send text messages f) Storing of Media/attachments on the cloud through Amazon or Azure platform. g) Identifying the location of the logged in user h) Sending automatic Email Notifications using background jobs running at periodic intervals. i) Interaction with Google and Facebook APIs for Location/Business search Skills required ASP.NET, SQL, C# Programming, MVC, Angular.js