Windows Phone developer

Looking for a native windows mobile developer (C sharp), for building an app. The app in which photos automatically generates likes or comments. automated program which works automatically. the client want to generate 5000 user name to like one photo 5000 [login to view URL] already have mysql database we can utilize. . ok. . the bot must generate these 5000 user account. . I would use as much of the api as I can unless they change the api which is a easy fix. . I want to use the api for this as much of the api. . .I dont want the program to break. ...We want well qualify windows8 mac and PC app that run on both.. because i have too much projects in future so that we can manager it soon. . . Experience person should apply. . .