Hi Sir,
We are a group of Developer with each one have huge experience in these technology IOS-Swift3, Android, Java, Backend PHP. We developed many IOS, Android app and written high scalable back-end in Java/J2EE as well as on PHP also .
We are also expert in integration with 3rd party API, like Social media, Payment gateway . We already done Facebook, Google, Twitter signin integration in mobile apps. Apart from that also integrated, PayPal, Braintree, Stripe payment gateway integration .
We always work on wire-frame provided by client and match their exact expectation in terms of UI and quality of App. As we reviewed your requirement it's looking good to us and we are ready to do your complete project for all platform. You don't have to worry about to talk with multiple developer just one place for all your need.
We are new to upwork, but huge experience while working for companies. We worked for top Indian IT company and now we started our own development house. Please feel free to message me for demo or talk further .
Thanks,
LUE