We are a team of experienced developers with iOS and Android, mostly with communication protocols like XMPP and SIP. We have developed a few client-server apps with XMPP and eJabbered. All our applications include Multi-User Chat, sending online, idle and offline presence, sending location, files, photos and videos. We also work with mobile databases, message encryption at the highest level (2048 bit, private and public keys and openssl xmpp socket encryption).
This xmpp communication protocol in extensible to many forms. It only depends on the kind of aplication you want to develop.
We work with node.js, MongoDB, noSQL,PHP, etc.
We can work on iOS and Android only. We also have a backend team. On iOS we only work on iOS 7 with ARC. On Android we have a compatibility library that allows us to start from 2.2. We have developed several xmpp applications and we use webRTC(former libjingle) for voice and video calling and xmpp signaling for the stun/turn servers to connect to the proxy.
We work on an hourly rate or rate/2 weeks. We still need more information about the application.
We have a demo ready.
skype: bogdansturza