AI assistant call handling

I’m looking for a developer to build an AI-powered call handling and dispatch system for emergency/facilities maintenance calls, similar to corecall.co.uk. I have an existing IP phone system this needs to integrate with. ( Hihi)

What it needs to do:

• Answer inbound calls via AI (voice agent), 24/7
• Have a natural conversation to capture caller name, location, fault description, and urgency
• Automatically match and dispatch the right engineer based on skill, location, and availability
• Send SMS/email notifications to both the engineer and the customer
• Provide a live dashboard showing incidents, statuses, and engineer availability
• Integrate with our existing systems

Ideal experience:

• Voice AI platforms (Vapi, Retell, Bland, or similar)
• SIP/VoIP and PBX integration (3CX experience a strong plus)
• Backend development (Node.js or similar) — APIs, webhooks, databases
• Twilio or similar for SMS/email notifications
• Comfortable building a clean operational dashboard

Nice to have:

• Prior experience building call-handling/dispatch systems for trades, FM, or field service businesses
• Experience with Anthropic/OpenAI APIs for conversational logic

To apply, please include:

• Relevant past projects (especially anything involving voice AI or SIP/PBX integration)
• Your estimated hourly rate and roughly how many hours you’d expect this to take
• Any questions about scope

I already have a working architecture plan and some backend code scaffolded, so this isn’t starting from zero happy to share on request.

PLEASE DO NOT ADD ME ON LINKED IN OR EMAIL ME OR MAKE ANY CONTACT OUTSIDE OF THIS PLATFORM I WILL REPORT AND BLOCK