Web Voice & Chat Integration -- 2

I need a developer who can embed real-time voice calling and chat messaging into both my website and mobile app so our customer-support team can speak with visitors without asking them to leave the page.

Scope
• Build or configure a WebRTC-based voice channel that launches from a “Call Support” button.
• Add a live-chat panel that shares the same session so an agent can switch between typing and talking seamlessly.
• Provide the APIs, front-end widgets, and any server components required to keep latency low and audio clear across modern browsers and iOS/Android apps.
• Deliver setup instructions plus brief documentation showing how to:
– authenticate users/agents,
– record or log conversations,
– adjust branding and colors,
– monitor basic call stats.

I already have REST endpoints for user accounts; you can extend or wrap them as needed. Code should be clean, commented, and ready for future feature add-ons like video.