I will build ai voice agent and ai calling bot with vapi and python


Level 2
About this gig
Is your business missing calls or losing leads? I build Custom AI Voice Agents that answer calls, qualify leads, book appointments, and follow up 24/7, without a single human on the line.
WHAT YOUR AI VOICE AGENT CAN DO:
- Answer inbound calls & handle customer queries instantly
- Make outbound calls for lead follow-up & appointment setting
- Qualify leads with natural, intelligent conversation
- Book appointments into Google Calendar or your CRM
- Detect voicemails & leave professional messages
- Transfer calls to a human agent when needed
- Retrieve answers from your docs in real-time using RAG
️TECH STACK:
- VAPI, Retell AI, Bland AI, ElevenLabs
- LangChain, LangGraph, CrewAI
- Pinecone, ChromaDB, Qdrant, FAISS
- GPT, Claude, Llama 3/4
- Python (FastAPI), Twilio, WebSockets
WHY I'M DIFFERENT:
- Most sellers use fragile no-code setups. I build production-grade agents with:
- RAG-powered brains answers from YOUR knowledge base
- LangGraph orchestration multi-step reasoning & memory
- Full CRM sync every call logged, every lead captured
- 100% source code ownership
- Scalable handles hundreds of simultaneous calls
Get to know Mudassir
Full Stack AI Engineer
Level 2
- FromPakistan
- Member sinceJul 2023
- Avg. response time5 hours
- Last delivery4 days
Languages
Urdu, English, Turkish
My Portfolio
Other AI Development Services I Offer
FAQ
What is an AI Voice Agent and how is it different from a regular chatbot?
An AI Voice Agent conducts real phone conversations using natural language — it listens, understands context, and responds just like a human. Built with Python, LangChain, and VAPI, it handles inbound and outbound phone calls, detects voicemails, transfers to human agents.
Which voice platforms do you use — VAPI, Retell AI, or Bland AI?
I work with VAPI, Retell AI, and Bland AI depending on your use case. VAPI is my primary choice for complex Python-based logic and LangGraph integrations. I'll recommend the right platform after understanding your specific needs.
What makes your voice agents better than no-code solutions?
No-code voice agents use rigid scripts that break when callers say something unexpected. My agents are powered by LangChain + LangGraph, giving them true reasoning ability and dynamic conversation flow. I also integrate RAG so the agent can pull accurate answers from your data.
What do I need to provide to get started?
1. Your business description and what the agent should handle 2. A phone number or I can provision one via Twilio. 3. CRM or calendar access if integration is need.ed. 4. Data for RAG. 5. A quick message before ordering helps me scope everything correctly so we build it right the first time.
