i need a facebook devoloper

need a facebosok developer to sort out my facebook buisness page into an ios app on the app store and one in android version.i have done most of it but the apk changed or something needs a new apk download and the configuration keys linking up to my git hub and azure accounts as well as my linode servers with a load ballancer on can any one assist please for about 300 pounds please.i dont mind paying u some extra when im set up and getting downloads paid for the app.As i do have a big client list and will be making all me clients pay for the app to use my services and buy goods on me app.ITS JUST TAKING ME WAY TO LONG TO IMPLEMENT CORRECTLY.IT JUST NEEDS SOME FINE TUNING