Android App for Ecommerce Website, including PayPal integration

I want to make Android App for eCommerce website, with PayPal integration. We will provide all Jason code required for Android App. . We are only looking for Experienced Android Developers for this project. . Terms & Conditions . (1) Android Developer should be available 24 X 7 online on advance notice for discussion related with project. We will inform the timings in advance, and developer should be available. Our preferred timings will be during Indian Business Hours. (2) We will escrow the amount once we will find 100% PayPal working in sandbox or live android app environment. So, you can first finish PayPal first. (3) Only Experienced Android Developer who have experience in PayPal should apply for this . Please reply with . (1) Costing (2) Time Frame . We have attached uncompleted demo of our application, what we are looking for. Our previous project has been stopped in middle, so no source code is available from previous project. We are looking for similar project with 100% working payment gateway.