You will get a real-time Voice AI agent integrated into your mobile or web app
Top Rated
Project details
I will build or integrate a real-time Voice AI agent for your mobile app, web app, or phone workflow.
The agent can understand natural speech, generate context-aware responses, and reply using a natural voice. Depending on your package, it can search a knowledge base, remember conversation context, call external tools, book appointments, collect information, update your systems, or transfer conversations to a person.
I work with OpenAI, ChatGPT, Whisper, Vapi, Twilio, speech-to-text, text-to-speech, conversational AI, Node.js, TypeScript, APIs, PostgreSQL, Supabase, Firebase, and AWS.
I bring 4,164 Upwork hours across 38 contracts, with 100% Job Success and Top Rated status. My experience includes a real-time voice-to-voice chatbot for mobile and web, plus mobile and backend development for a cloud-connected telephony product.
Before development begins, we will confirm the conversation flow, voice channel, knowledge sources, integrations, actions, testing criteria, and deliverables.
Third-party AI, voice, telephony, hosting, and phone-number charges are paid directly by the client.
Please message me before ordering so I can confirm the right package.
The agent can understand natural speech, generate context-aware responses, and reply using a natural voice. Depending on your package, it can search a knowledge base, remember conversation context, call external tools, book appointments, collect information, update your systems, or transfer conversations to a person.
I work with OpenAI, ChatGPT, Whisper, Vapi, Twilio, speech-to-text, text-to-speech, conversational AI, Node.js, TypeScript, APIs, PostgreSQL, Supabase, Firebase, and AWS.
I bring 4,164 Upwork hours across 38 contracts, with 100% Job Success and Top Rated status. My experience includes a real-time voice-to-voice chatbot for mobile and web, plus mobile and backend development for a cloud-connected telephony product.
Before development begins, we will confirm the conversation flow, voice channel, knowledge sources, integrations, actions, testing criteria, and deliverables.
Third-party AI, voice, telephony, hosting, and phone-number charges are paid directly by the client.
Please message me before ordering so I can confirm the right package.
AI Algorithms
Large Language Model, Multimodal Large Language Model, Transformer ModelAI Applications
AI Chatbot, AI Mobile App Development, AI Text-to-Speech, AI-Enhanced Classification, Automatic Speech Recognition, Conversational AI, Natural Language Generation, Natural Language Understanding, Speech Synthesis, Text RecognitionAI Development Language
PythonAI Tools
Azure OpenAI, Hugging FaceAI Models
ChatGPT, GPT-4, LLaMA, WhisperWhat's included
| Service Tiers |
Starter
$4,000
|
Standard
$7,000
|
Advanced
$9,999
|
|---|---|---|---|
| Delivery Time | 18 days | 27 days | 45 days |
Number of Revisions | 2 | 3 | 4 |
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 |
Frequently asked questions
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Shruthi S.
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Had a great experience working with Haseeb and Umair through the platform. The developer assigned to the task was extremely diligent and completed all the tasks assigned on time. Would definitely recommend if you're getting started with your projects and need external help!
About Haseeb
Mobile App Development | React Native & iOS | AI Integration
100%
Job Success
Karachi, Pakistan - 4:58 am local time
I build AI-powered mobile applications for founders and product teams that need more than screens. I handle the React Native or Flutter app, Node.js backend, APIs, real-time features, AI integrations, and launch preparation as one connected product.
I have been building software since 2014. On Upwork, I have earned $100K+ across 38 contracts and 4,164 hours, with 100% Job Success and Top Rated status.
𝗔𝗜 𝗠𝗢𝗕𝗜𝗟𝗘 𝗔𝗣𝗣 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧
I help clients build and improve:
✅ AI mobile apps using React Native, Flutter, Node.js, and OpenAI
✅ Cross-platform iOS and Android applications
✅ Flutter app development with Dart, Firebase, APIs, and push notifications
✅ Caregiver, wellness, and medical-education applications
✅ Calling and messaging apps with call history, contact rules, and real-time communication
✅ AI chat, document processing, semantic search, and voice-to-voice experiences
✅ Booking, payment, subscription, and marketplace workflows
✅ Real-time applications with notifications, live data, and reliable synchronization
✅ Existing mobile products that need new features, integrations, or backend improvements
𝗥𝗘𝗟𝗘𝗩𝗔𝗡𝗧 𝗣𝗥𝗢𝗝𝗘𝗖𝗧 𝗘𝗫𝗣𝗘𝗥𝗜𝗘𝗡𝗖𝗘
My longest Upwork client relationship was TeleCalm, a phone-safety product for seniors living with Alzheimer’s and their caregivers.
Across three contracts and approximately 1,641 hours, I worked on the caregiver mobile application and supporting telephony backend. The product handled contact management, blocked callers, call history, phone-service rules, telephony events, call records, and administrative visibility.
I have also delivered:
• A real-time voice-to-voice chatbot for iOS, Android, and web
• A React Native iOS application through a 548-hour, 5-star contract
• An AI creator-insights SaaS platform through an $8,000, 5-star contract
• A Node.js, AWS, Serverless, OpenAI, and Prisma backend for Bummock AI
• OpenAI-powered document processing, semantic search, and messaging applications
𝗠𝗢𝗕𝗜𝗟𝗘 𝗔𝗣𝗣 𝗔𝗡𝗗 𝗔𝗜 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘
Mobile App Development • AI Mobile App Development • React Native • Flutter • Flutter App Development • Dart • iOS Development • Android App Development • Cross-Platform App Development • Hybrid App Development • Node.js • TypeScript • OpenAI API • AI Model Integration • API Integration • REST API • PostgreSQL • Supabase • AWS • Firebase • Push Notifications • Chat and Messaging Software • Full-Stack Development
𝗛𝗢𝗪 𝗜 𝗪𝗢𝗥𝗞
* Understand the users, business requirements, and existing product
* Define the scope, architecture, milestones, and technical risks
* Build the mobile experience, backend, and integrations
* Share reviewable builds throughout development
* Prepare the application for testing, deployment, and store submission
* I can work from an early product idea, extend an existing application, or take ownership of a specific mobile or AI feature. I will also tell you when a feature adds unnecessary cost or complexity.
𝗡𝗘𝗫𝗧 𝗦𝗧𝗘𝗣
Send me:
• What the application does
• Whether it is new or already in development
• The main feature or problem you need help with
• Your preferred timeline
I will review the requirements and give you a direct assessment of the scope, technical approach, and best next step.
Steps for completing your project
After purchasing the project, send requirements so Haseeb can start the project.
Delivery time starts when Haseeb receives requirements from you.
Haseeb works on your project following the steps below.
Revisions may occur after the delivery date.
Use case and conversation design
I will confirm the users, voice channel, conversation flow, supported languages, required actions, integrations, knowledge sources, and package deliverables.
Voice AI foundation
I will configure speech recognition, the language model, text-to-speech, system prompts, conversation memory, voices, and error-handling rules.