Voice AI Appointment Booking System Developer

I am looking for an experienced AI automation developer to build a voice AI appointment booking system for service businesses. The system should answer inbound calls, understand customer requests, check availability, book appointments, reschedule or cancel appointments, update CRM records, and send confirmations by SMS or email. This should be a controlled business automation system, not a generic chatbot. The AI should understand the customer’s intent, but the booking logic must be handled through clear business rules, calendar validation, and database workflows. Required features: Inbound AI voice agent Appointment booking, rescheduling, cancellation, and confirmation Google Calendar integration CRM integration Customer profile and appointment history SMS/email confirmations Call transcription and summaries Admin dashboard Business rules for availability, services, staff, and locations Knowledge base for FAQs Escalation or live transfer when needed Multi-business / reusable architecture Preferred stack: React / Next.js, Node.js or FastAPI, PostgreSQL/Supabase, Twilio or Telnyx, ElevenLabs, Deepgram, OpenAI/Claude, LangChain, Qdrant or pgvector, WebSockets, Docker. Budget: $5,000–$12,000 Duration: 2–3 months initially, with ongoing improvements Experience level: Expert Project type: Long-term AI automation product I want someone who can build a reliable production system, document it properly, and help scale it across multiple business types.