I will build a retell ai voice agent and booking system

M
mo_aatif
M
mo_aatif
Muhammad A
build a retell ai voice agent and booking system
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build a retell ai voice agent and booking system
Full Screen
Full Screen
build a retell ai voice agent and booking systembuild a retell ai voice agent and booking systembuild a retell ai voice agent and booking system

About this gig

Need a Retell AI voice agent connected to real business workflowsnot just a basic demo?

I build and integrate Retell AI voice systems using Python, FastAPI, webhooks, PostgreSQL, Cal.com, and external APIs.

Depending on the package selected, I can:

Configure one Retell AI voice agent

Connect Retell to an existing webhook

Build a custom FastAPI webhook backend

Integrate appointment booking or CRM workflows

Add PostgreSQL persistence

Implement webhook verification and idempotent processing

Provide source code and technical documentation

My production work includes a lead-to-booking backend that captures leads, launches Retell calls, validates availability, books appointments through Cal.com, and maintains authoritative workflow state.

Each package has a defined scope. Retell usage, phone numbers, hosting, and other third-party service fees are not included in the Gig price.

Please message me through Fiverr before ordering if your workflow requires multiple agents, multiple integrations, custom dashboards, outbound campaign logic, or advanced production infrastructure.

  • AI engine

    • Retell AI

  • Programming language

    • Python

Get to know Muhammad A

Muhammad A

AI Automation Engineer FastAPI, Voice AI Agent Systems

  • FromUnited States
  • Member sinceJul 2026

  • Languages

    English, Urdu, Arabic, Spanish
I build reliable AI automation systems for businesses that need more than a prototype. I work with Python, FastAPI, Retell AI, voice agents, API integrations, webhooks, PostgreSQL, and booking workflows. I developed and deployed the core backend for an AI voice lead and booking platform with signed webhooks, idempotency, provider-state recovery, DNC enforcement, and Cal.com integration. I also built a responsive restaurant ordering website with Next.js, Supabase, and Stripe. I design, build, integrate, and harden backend and AI workflows with clear scope and maintainable architecture.

My Portfolio

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