WebRTC Web Phone Integration on Flashphoner Web Call Server 3

A specialist is required to integrate a web phone into the company’s website.

We are ready to provide a widget design in the form of a PSD layout and configured for Flashphoner Web Call Server 3 calls.
The code that will be used to support the integration is https://github.com/flashphoner/flashphoner_client/tree/wsc

Requirements:
- cross-browser layout of the phone
Integration of a folded phone into the company’s website
- elements of layout and design should work correctly when making calls.

From you:
Experience with JavaScript/css/php, cross-browser layout
- understanding of the basics of WebRTC and HTML5

Budget: Up to 1000 USD

Please indicate the approximate implementation time and budget.
Preference will be given to a specialist who already has similar experience.