You will get a custom AI voice agent using Retell AI, ElevenLabs, Twilio, or Vapi
Top Rated
Top Rated
Project details
You will get a custom AI voice agent built with Retell AI, ElevenLabs, Twilio, Vapi, OpenAI, or similar voice technologies. The agent can handle natural inbound or outbound calls, answer customer questions, qualify leads, book appointments, collect information, and trigger business workflows.
I will configure the conversation flow, voice, prompts, call handling, and required integrations based on your business needs. Your agent can connect with calendars, CRMs, databases, APIs, webhooks, and automation platforms.
Depending on the selected package, the project may include:
• Inbound or outbound AI calling
• Appointment booking and lead qualification
• Natural speech recognition and voice responses
• CRM, calendar, API, or webhook integration
• Call summaries and structured data capture
• Function calling and automated follow-ups
• Testing, deployment, and source code
The final solution will be designed for reliable conversations, lower latency, and a smooth caller experience. Third-party platform and usage charges are not included.
I will configure the conversation flow, voice, prompts, call handling, and required integrations based on your business needs. Your agent can connect with calendars, CRMs, databases, APIs, webhooks, and automation platforms.
Depending on the selected package, the project may include:
• Inbound or outbound AI calling
• Appointment booking and lead qualification
• Natural speech recognition and voice responses
• CRM, calendar, API, or webhook integration
• Call summaries and structured data capture
• Function calling and automated follow-ups
• Testing, deployment, and source code
The final solution will be designed for reliable conversations, lower latency, and a smooth caller experience. Third-party platform and usage charges are not included.
AI Algorithms
Large Language Model, Long Short-Term Memory Network, Multimodal Large Language Model, Recurrent Neural Network, Transformer ModelAI Applications
AI Chatbot, AI Text-to-Speech, Automatic Speech Recognition, Conversational AI, Natural Language Generation, Natural Language Understanding, Sentiment Analysis, Sequence Modeling, Speech SynthesisAI Development Language
PythonAI Tools
Azure OpenAI, Hugging Face, PyTorch, TensorFlowAI Models
BERT, ChatGPT, GPT-4, LLaMA, WhisperWhat's included
| Service Tiers |
Starter
$300
|
Standard
$600
|
Advanced
$1,200
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 0 | 1 | 3 |
AI Model Integration | |||
Batch Normalization | - | - | - |
Database Integration | - | ||
Detailed Code Comments | - | ||
Image Upscaling | - | - | - |
MLOps | - | - | - |
Model Deployment | |||
Model Documentation | - | - | - |
Model Monitoring | - | - | - |
Model Testing & Optimization | - | ||
Model Tuning | - | - | - |
Natural Language Processing | |||
NLP Tokenization | - | - | - |
Pre-Training | - | - | - |
Prompt Engineering | |||
Setup File | |||
Source Code |
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Fitim B.
Jun 24, 2026
Claude Demos Loom/OBS
Easy to work with and great communicator.
GU
Gale U.
Mar 27, 2026
Full Stack Django Developer (Data & AI Integration)
GU
Gale U.
Mar 24, 2026
Full Stack Django Developer (Data & AI Integration)
FA
Filshed A.
Mar 10, 2026
Junior AI Engineer for MVP Development
Hassan works efficiently. Practical and upfront.
If you need a Developer that works fast, consistent and knowledgeable, Hassan is your guy!
If you need a Developer that works fast, consistent and knowledgeable, Hassan is your guy!
sc
steven c.
Nov 26, 2025
Chat/AI to Text Expert/AI to Video
Working with Muhammad has been an excellent experience from start to finish. He is professional, responsive, and clearly committed to delivering high quality work. Communication was clear and consistent throughout the project — he asked smart questions up front, provided progress updates without being asked, and was always quick to respond when I had feedback or revisions.
Muhammad delivered exactly what I needed, on time and to a very high standard. He was flexible when the scope evolved, offered helpful suggestions based on his expertise, and never hesitated to go the extra mile to make sure everything was right.
I would not hesitate to hire Muhammad again for future projects and I highly recommend him to anyone looking for a reliable, skilled, and trustworthy freelancer on Upwork.
Muhammad delivered exactly what I needed, on time and to a very high standard. He was flexible when the scope evolved, offered helpful suggestions based on his expertise, and never hesitated to go the extra mile to make sure everything was right.
I would not hesitate to hire Muhammad again for future projects and I highly recommend him to anyone looking for a reliable, skilled, and trustworthy freelancer on Upwork.
About Muhammad
AI Full-Stack Developer | Python, Django, FastAPI, RAG, LLM
100%
Job Success
Faisalabad, Pakistan - 8:12 am local time
As a Top Rated Plus developer with 50+ completed Upwork projects, I have helped clients build, complete and improve AI-powered products, backend systems, voice agents, RAG applications and data-driven platforms.
My focus is not limited to adding an OpenAI API to an application. I build the complete system around the AI feature including backend architecture, data pipelines, APIs, user roles, payments, integrations, deployment and production reliability.
✅What I Can Help You Build
* AI-powered SaaS platforms and internal tools
* Python backends using Django, FastAPI and Flask
* RAG systems with embeddings, vector search and document processing
* Voice AI agents using Twilio, Deepgram, ElevenLabs and OpenAI
* LLM integrations using OpenAI, Claude and structured AI workflows
* React and Next.js dashboards connected to Python APIs
* REST APIs, webhooks and third-party integrations
* Authentication, user roles, subscriptions and Stripe payments
* Background processing, real-time systems and large-data workflows
* Existing application debugging, optimization and completion
✅Relevant Project Experience
◾DataVersion
AI document-processing and RAG platform built with FastAPI, Next.js, Supabase, AWS and Pinecone.
◾Key2
AI voice and telecom platform using Django, FastAPI, Twilio, ElevenLabs, OpenAI and Deepgram.
◾OpenHome
Voice AI application built with Django, Vue.js, Deepgram, ElevenLabs, OpenAI and AssemblyAI.
◾PitchFit
AI-powered SaaS application developed with Flask, FastAPI, React and Express.js.
✅My Core Technology Stack
⭐AI and LLMs: OpenAI, Claude, RAG, AI agents, embeddings, vector databases, prompt engineering and document processing
⭐Voice AI: Twilio, Deepgram, ElevenLabs, Retell, speech-to-text, text-to-speech and real-time voice workflows
⭐Backend: Python, Django, FastAPI, Flask, Node.js, Express and NestJS
⭐Frontend: React, Next.js and Angular
⭐Data and Infrastructure: PostgreSQL, Supabase, MongoDB, Redis, Firebase, AWS, Docker and DigitalOcean
⭐Automation and Integrations: n8n, APIs, webhooks, Zapier and Make
✅ Why Clients Work With Me
-- Clients describe me as reliable, collaborative, responsive and committed to quality.
⭐One client shared:
“Best developer I have ever worked with on this platform.”
⭐Another said:
“If you need a developer that works fast, consistent and knowledgeable, Hassan is your guy!”
I am comfortable joining projects at any stage whether you need to build an MVP, add AI features to an existing product, repair an unstable backend or prepare a prototype for production.
Send me a brief description of your product, current stack and the main problem you need solved. I’ll review it, identify the fastest path forward, and tell you exactly how I can help no vague promises, no wasted time.
Looking forward to have a Fruitful Conversation with u :)
Steps for completing your project
After purchasing the project, send requirements so Muhammad can start the project.
Delivery time starts when Muhammad receives requirements from you.
Muhammad works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements and Use Case Review
Voice Agent Flow and Prompt Setup