HELLO DEAR ,
I CAN ADD PAYMENT GETWAY ON YOUR WEBSITE AND ANDROID APP.
PLEASE MESSAGE ME FOR FURTHER DISCUSSION.
We have knowledge of ANDROID, PHP, MYSQL, PAYMENT GETWAY , IOS, Xcode IDE(Objective-C), Swift, Eclipse IDE, Android SDK, ADT Plugin, Java Programming, JSON, XML, Utility APIs, MySQL and SQL server database, super level UI design and much more.