Android App to sell vouchers using Paypal

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I'm looking for developers to write an Android App to sell vouchers of prepaid mobile phones and Internet credit.

I have already developed a small demo of the app that can be found on Google Play by searching for "XAVA Mobile".
I already have a Mysql database with clients,vouchers and all the sells.
I already have a webservice that will connect the app with the mysql database using PHP and JSON.

What i want the developer to do is:

Implement the Paypal Mobile Payment Library on my Android App.
Implement Customized layout based on my own design(I will send the JPG designs of every layout/activity to you). The App will have less than 10 activities
Implement Facebook and Android Login in my App.

I have only 4 days to finish the app, so please let me know how much time do you need to finish it
I will attach some of the activity layout designs here

Skills required:
Android, Mobile Phone
Additional Files: Operadoras.jpg Recargas lista.jpg Login with social.jpg
About the employer:
Public Clarification Board
Bids are hidden by the project creator. Log in as the employer to view bids or to bid on this project.
You will not be able to bid on this project if you are not qualified in one of the job categories. To see your qualifications click here.

$ 526
in 10 days
$ 526
in 4 days
$ 618
in 25 days
$ 833
in 15 days
$ 155
in 3 days