We need number of integrated VOIP client applications for:
2/. Android phone
3/. IOS (phone & desktop)
These applications will allow advanced functionality to access and utilise our hosted VOIP platform in a secure manner with the right credentials to make calls, view presence, access instant messaging, and conference calling etc.
We need to own the code and be able to brand the application, however it can be based on open source SW if the licence allows that.
Preference will be given to developers with prior experience in this specific area, and can demonstrate expertise and or existing applications.
Development can be staged over time and functional features, but a clear timeframe will be important.
Pricing for each platform should be separated, and totalled for the whole project.