Hi;
I am an experienced professional in Android and iOS (iPhone and iPad) Development. I have been working in the related fields for more than 4 years now. I can develop all app on both mobile platforms and cross platforms too.
I can definitely make an app similar to whatsapp/wechat/line for you with required back-end server codes for a chat mobile. Initially app will be developed on Android and then we are also interested to make this for you on iOS as well.
The app will use XMPP protocol for chat messaging using text, picture and voice. The XMPP client-server code implementation will be clean and shown to be working with server hosted on AWS cloud service, being scalable up to 10,000 users. The app will be integrated with Facebook through FB API for user ID, photo and friends list retrieval. Geo-location function will also be provided utilizing mobile phone's GPS/WiFi geo-location to do a proximity match of app users.
Mobile app will be incorporated with its key functions such as, but not limited to, the following: sign-on, log-on, user-profile, user search, geolocation search, active chats, chat management, settings and OS level chat alerts. The message transmission will be encrypted and auto secure-delete function of chat contents will also be made for you. Sufficient API documentation on chat and user related method calls will be provided as well as a key deliverable for this project. All identified bugs will be rectified during testing and delivery phase.