AI Voice Agent Developer Needed for HVAC Services Company

We are seeking an experienced AI Developer to build a production-ready AI Voice Agent for an HVAC services company to automate customer service. The primary goal of this voice agent is to handle inbound customer calls, greet clients, and answer their basic everyday questions. To support this, the system needs a clean UI/UX setup on the backend for monitoring call logs, tracking user requirements, and managing conversational states. The system must process voice input seamlessly, speak in a natural, human-like tone, and capture important client details accurately to ensure a smooth user experience. On the backend, the agent must interact with our scheduling systems or databases to check real-time technician availability and guide clients through booking maintenance or repair consultations. While we welcome your technical approach on the final architecture and specific stack, such as VAPI, Bland AI, Retell AI, or Twilio with Python, we expect a robust, reliable setup. We estimate a project timeline of roughly 4 to 8 weeks with an open budget that depends entirely on the depth of your technical expertise. To apply, please submit a comprehensive proposal showcasing your portfolio of previous AI voice agents or automated phone systems. Outline your proposed technical approach, explaining how you will structure the conversational logic for booking and your recommended tech stack. Finally, specify the performance protocols you will implement alongside a detailed breakdown of your estimated timeline and costs.