Is it wise use Node.js on backend with a webrtc app?

I believe that Node.js is quite cpu intensive and this added together with webrtc another cpu intensive tech, makes me wonder if the two together would negatively impact performance. One to one connections maybe not a problem but lets say you have 10/20 people connected surely that will cause issues? Would there be scalability issues? What backend language would you recommend in its place? Or would Node.js be ok.

Thanks