Hi,
I can create a module for FreePBX you require.
I have great experience working with Asterisk services and know how FreePBX works.
I have a great experience with such technologies like Asterisk, Node JS, VoiP.
So I can develop and support voice services.
Recently my team has integrated VOIP applications based on Asterisk to several Ukrainian and Russian hosting services providers.
It would be great if you could send me all requirement you have.
Look forward to get a mail from you