We looking for a developer to build a mobile voip app to make calls and have a call back function.
If you have previous knowledgement on codecs is fantastic!
The app must access the phone contacts list to make calls.
Require validation of the registered phone number to receive callback calls. When entering a number, sms confirmation must be sent with a validation code.
As an example you can check MobileVOIP app. Or Fring.
In a second phase of development we intend to enter videocall, free sms and text message between users of the same group.
This project belong to a American group with a branch in Lisbon.
If you own an agency or have a great apps portfolio we can negotiate. Let me know! Send me a message through this form.