Salam,
I am a Senior VoIP engineer with recognized strength in Asterisk and Specialist in WebRTC solutions,
Already done around ~20 advanced setups for WebRTC on Asterisk (Voice, Video, Conference) with the latest bug fixes and using ICE/STUN to solve all audio issues in NAT situation.
I have also experience to make it as secure as possible with SSL cryptography for Web Socket connection and Web based client.
Also please note that I will be on the backend and server side so probably you will need a developer for UI and customization on webrtc client.
Please review my profile and contact me for details.
Regards.