- Experience working with clients like Disney, Philips, MIT, AOL, Marvel, and Calpoly.
- 17 Years of Experience in Website Development.
- Expert in Angular, React, Node, Django, Laravel and CMSs like Expression Engine, Drupal, Wordpress/Shopify, and Woocommerce.
- Expert in Chatbot development using IBM Watson Conversation service, Dialogflow, and Motion.AI for Websites, Facebook and Slack
- Strong skills in Responsive HTML/HTML5, CSS/CSS3 work with knowledge of Bootstrap4 and SASS.
ExpressionEngine
CSS
jQuery
CakePHP
Laravel
Chatbot Development
IBM Watson
Harpalsinh G.
Rajkot, India
$20/hr
4.8
20 jobs
๐ฅ Upwork's Top Rated Plus Developer โญโญโญโญโญ
Expert-vetted ๐ | 2,200+ High-Quality Hours โฐ | Crafting Scalable Solutions Since 2017 ๐
Why Work With Me?
โจ Commitment: I'm all about meeting deadlines and making your project a success. On time, every time!
โจ Quality Assurance: Diligent and meticulous, I ensure top-notch project output every time.
โจ Clear Communication: I'm not just a coder; I'm a communicator. Clear, responsive, and always here for you!
โจ Simplicity Matters: I keep things simple, efficient, and effective.
Here's Why You Should Consider Working With Me:
๐ Experience Matters: With 6+ years in tech, I bring a wealth of knowledge in software and AI technology, offering strategic guidance for your business's success.
๐ป Full-Stack Expertise: A bias for action and a commitment to excellence define my full-stack skills. I ensure every project is of the highest quality.
๐ฃ๏ธ Communication Maestro: Whether it's Slack, Skype, MS Teams, or email, I'm your communication virtuoso. Questions, updates, or just a chatโI'm always here.
Client Testimonials:
๐ "Harpalsinh is a very responsive and regular person. He can get the things done. I will definitely recommend a cooperative freelancer like him."
๐ "Kudos to Harpalsinh and team for being a deadline superheros. They not only met every deadline but also made sure our project executed smoothly. Communication was on point. They are truly tech genius. I highly recommend them."
๐ "Harpalsinh was a steady contributor when I hired him for a special project. He is very responsive. Overall, we are very satisfied with his output and will stay in touch with him in future projects. Good luck!."
Services I Offer:
โ Complex Systems Architecture, ERP, CRM, and Chatbot Development
โ Business Process Automation
โ API, Full-Stack Web, and Mobile App Development
โ Custom Enterprise Portals, Order and Inventory Management Systems, Dashboards, Analytics, and Reporting Systems
โ SaaS Platforms, Marketplaces, CMS Websites
โ Strategic Guidance and Technical Leadership for Startup Teams
โ Generative AI Implementation (Open AI)
โ Data Engineering (Hadoop, Big Data, Data Modeling, Data Pipelines, Workflow Management)
My Approach for Successful Project Outcomes:
1๏ธโฃ Understand Goals: Dive deep into customer goals and visions.
2๏ธโฃ Suggest Solutions: Provide technical solutions aligned with business objectives.
3๏ธโฃ Development: Craft technical requirements and design, then implement the solution.
4๏ธโฃ Hand-off & Support: Provide hand-off, training, and ongoing support.
Tech Stack:
๐ ๏ธ Tech: React, Next/Nuxt, Angular, NodeJS, GraphQL, .NET (C#), Python/Django, TypeScript, Redux, JavaScript, PHP, WordPress, Laravel, Tailwind CSS, HTML5/CSS3
๐ Database: MS SQL, MongoDB, MySQL, PostgreSQL, ChromaDB, Redis, MariaDB
๐ Serverless: Functions
โ๏ธ Cloud: Azure, AWS, Google Cloud Platform
โ๏ธ DevOps: GitHub, Azure DevOps, CI/CD, Docker, Jenkins, Selenium, Kubernetes, CircleCI, Bitbucket
๐ง Generative AI: Open AI, ChatGPT, Dall.E.3, Stable Diffusion, Llama, Lambda, Hugging Face. LangChain
๐ค Agentic AI: LangChain, LangGraph, AutoGen, Haystack Agents, AutoGPT, Meta Agents, Chain-of-Thought Reasoning, Multi-Agent Orchestration, Vector Databases (Pinecone, Weaviate, Milvus)
PMO Tools:
๐ Jira, Trello, ClickUp, Asana, Notion, Zoho Projects โณ
In a nutshell, let's breathe life into your ideas and turn your vision into reality! If you're seeking a CTO or startup tech advisor with strategic guidance, technical leadership, and excellent development skills, reach out! Click the green ๐ฉInvite to Job๐ฉ button and let's kick off your next project! Excited to hear from you soon.
Thank You ๐๐ป
Dialogflow API
Dialogflow
Natural Language Processing
Alexa Skills Kit
Amazon Web Services
ManyChat
Node.js
Bot Development
Angular
WhatsApp
Chatbot Development
Angular 2
Google Cloud Platform
Azure App Service
Instagram
Microsoft Bot Framework
Shyam P.
Rajkot, India
$30/hr
4.9
70 jobs
# Expert AI Voice Agent Engineer | OpenAI | Twilio | VAPI | ElevenLabs | Deepgram
I specialize in designing and developing enterprise-grade AI Voice Agents that enable businesses to automate customer interactions through natural, real-time conversations. With over **8 years of experience** in software engineering and AI solutions, I help startups, SaaS companies, healthcare organizations, and enterprises build scalable Voice AI platforms that improve customer experience and operational efficiency.
My expertise spans the entire Voice AI stackโfrom telephony infrastructure and real-time audio streaming to LLM orchestration, backend architecture, and cloud deployment. I build production-ready solutions capable of handling inbound and outbound calls, appointment scheduling, customer support, lead qualification, and business process automation.
# Core Expertise
* AI Voice Agents & Conversational AI
* OpenAI GPT-5, GPT-4o & Realtime API
* Twilio Programmable Voice & Media Streams
* VAPI, Retell AI & LiveKit
* ElevenLabs (Text-to-Speech)
* Deepgram (Speech-to-Text)
* WebRTC, SIP & VoIP Technologies
* Real-Time Audio Streaming
* Function Calling & AI Agent Workflows
* LangGraph, LangChain & Agentic AI
* Retrieval-Augmented Generation (RAG)
* Model Context Protocol (MCP)
* Node.js, Python & FastAPI
* REST APIs & WebSocket Architecture
* PostgreSQL, Redis & MongoDB
* AWS, Docker & Cloud Infrastructure
# Services
I develop custom Voice AI solutions including:
* AI Receptionists & Virtual Assistants
* AI Customer Support Agents
* AI Sales & Lead Qualification Systems
* Appointment Scheduling Assistants
* Healthcare & Medical Voice Agents
* AI Call Center Automation
* Outbound AI Calling Solutions
* Restaurant & Hospitality Voice Assistants
* Internal Business Voice Assistants
* Custom Conversational AI Platforms
# System Integrations
My solutions integrate seamlessly with existing business platforms and workflows, including CRM systems, calendars, knowledge bases, payment platforms, communication tools, and custom APIs. I have experience integrating with Google Calendar, Microsoft Outlook, HubSpot, Salesforce, GoHighLevel, Slack, Stripe, WhatsApp, and other third-party services.
# Development Approach
I believe successful Voice AI systems require more than connecting APIsโthey require thoughtful architecture, low-latency communication, reliable infrastructure, and seamless user experiences. Every project is built with scalability, security, maintainability, and production deployment in mind.
From solution architecture and backend development to AI orchestration, deployment, monitoring, and optimization, I provide end-to-end development services while maintaining clear communication throughout the project lifecycle.
If you're looking for an experienced engineer to design and build reliable, production-ready AI Voice Agents tailored to your business requirements, I'd be glad to help deliver a solution that creates measurable business value.
Dialogflow
AI Chatbot
AI Development
AI App Development
LLM Prompt Engineering
ChatGPT
Claude
AI Agent Development
LangChain
OpenAI API
Twilio
Conversational AI
Chatbot Development
Retrieval Augmented Generation
ElevenLabs
Automatic Speech Recognition
AI Text-to-Speech
Generative AI
Natural Language Processing
Python
Amol B.
Mohali, India
$35/hr
4.8
180 jobs
I build production-ready AI agents, Voice AI systems, RAG knowledge assistants, and workflow automations that reduce manual work, improve response speed, and help businesses operate more efficiently.
I help startups, healthcare teams, service businesses, and growing companies move from manual processes to AI-powered operations that people actually use every day.
What I build:
โข AI Agents & Agentic Workflows for sales, support, operations, and internal teams
โข Voice AI Agents for intake, qualification, appointment reminders, and follow-ups
โข RAG Knowledge Assistants that let teams search documents, SOPs, and business knowledge instantly
โข AI Chatbots for customer support, lead qualification, and internal workflows
โข Workflow Automations using n8n, Make, Zapier, APIs, webhooks, and CRMs
โข AI-Powered SaaS Features using OpenAI, Claude, LangGraph, FastAPI, and vector databases
Recent outcomes:
โข Reduced manual outreach effort by 80% with a healthcare Voice AI agent
โข Reduced response and execution time from hours to minutes through AI workflow automation
โข Helped teams search large document libraries instantly using RAG systems
โข Connected CRMs, conversations, scheduling, and reporting into unified automation workflows
โข Helped companies move from testing AI ideas to launching production-ready AI systems
Tools I work with:
OpenAI, Claude, LangGraph, LangChain, n8n, Make, Zapier, FastAPI, Python, APIs, webhooks, vector databases, Vapi, Retell AI, Twilio, CRM integrations, and AI infrastructure.
I donโt build AI demos that break after launch. I build reliable systems with clear workflows, error handling, human handoff, logging, documentation, and business logic.
If you need an AI agent, Voice AI workflow, RAG assistant, or automation system built properly from strategy to deployment, message me and Iโll help you map the fastest practical path to production.
AI Agent Development
AI Chatbot
n8n
Make.com
OpenAI API
Retrieval Augmented Generation
API Integration
CRM Automation
LangChain
Zapier
Python
FastAPI
Vector Database
Automation
Chatbot Development
Pinecone
Airtable
Notion
SaaS Development
CRM Software
Mayank G.
Ranchi, India
$25/hr
5.0
22 jobs
Need a production-ready AI system โ RAG pipeline, LLM integration, or intelligent automation? I build full-stack AI applications with Python and Next.js that go live, not just demos. 6+ years, $50K+ earned on Upwork, Top Rated Plus.
I sit at the intersection of AI engineering and full-stack development โ which means I don't just wire up an API call and call it an AI product. I design the data pipeline, the retrieval layer, the LLM orchestration, and the frontend interface as a single cohesive system. Most clients come to me after a previous developer delivered a fragile prototype. I deliver production systems.
My core stack: Python, FastAPI, LangChain, RAG, LLM fine-tuning, Next.js, React, Node.js, PostgreSQL, MongoDB, AWS, Azure.
Here is what I build:
Full-Stack Apps โ Next.js + React frontends connected to AI-powered backends
AI Agents โ WhatsApp bots, voice agents, inbound/outbound call agents, customer support automation
RAG Systems โ document Q&A, PDF + SQL retrieval, enterprise knowledge bases
LLM Integrations โ OpenAI, Anthropic, fine-tuning, prompt engineering, model evaluation
Backend APIs โ FastAPI, REST, GraphQL, scalable Python microservices
AI Data Pipelines โ ETL, scraping, clustering, vector search, resume parsing
Automations โ n8n, Zapier-style workflows, social media automation
Proofs
Top Rated Plus on Upwork (top 3% of talent)
100% Job Success Score
Zapier Certified Expert | Make, n8n, Airtable integrations
Built an internal RAG chatbot at CION Investments โ reduced document lookup time by ~60%
Built a voice booking platform at Yoderlay โ cut booking time by ~40%
Delivered AI solutions across fintech, HR tech, hospitality, e-commerce, and recruitment
Send me a message describing your project. I respond within a few hours and can usually share a technical approach or a relevant portfolio example the same day.
EXPERTISE:
AI Automation | No-Code Development | Airtable | Zapier | Make | n8n | AI Agents | ChatGPT Integration | LLM Implementation | Workflow Automation | API Integration | Database Design | Digital Workers | Business Process Automation
API Integration
AI Chatbot
AI Development
AI Agent Development
AI Model Training
AI Model Development
Generative AI Prompt Engineering
Mobile App Development
Web Application
Python
Node.js
React
Make.com
Zapier
n8n
Airtable
WhatsApp
Gaurav M.
Pathankot, India
$15/hr
4.7
28 jobs
๐ ๐๐ฆ ๐ ๐๐จ๐ฉ ๐๐๐ญ๐๐ ๐๐ฅ๐ฎ๐ฌ ๐๐ ๐๐ก๐๐ญ๐๐จ๐ญ ๐๐ง๐ ๐๐จ๐ง๐ฏ๐๐ซ๐ฌ๐๐ญ๐ข๐จ๐ง๐๐ฅ ๐๐ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐๐ซ ๐ฐ๐ข๐ญ๐ก ๐๐๐% ๐๐จ๐ ๐๐ฎ๐๐๐๐ฌ๐ฌ, ๐๐ ๐๐ฉ๐ฐ๐จ๐ซ๐ค ๐ฃ๐จ๐๐ฌ, ๐๐ง๐ ๐,๐๐๐+ ๐ก๐จ๐ฎ๐ซ๐ฌ. I build custom AI chatbots, AI assistants, RAG applications, voice bots, and tool-using AI agents for customer support, internal knowledge, education, SaaS products, lead qualification, appointment scheduling, and business operations.
I help businesses turn their documents, websites, databases, APIs, and workflows into secure and useful conversational experiences. Whether you need an MVP, an existing AI bot improved, or a production-grade chatbot integrated into your platform, I can manage the complete development lifecycle.
โ ๐๐ก๐๐ญ ๐ ๐๐๐ง ๐๐ฎ๐ข๐ฅ๐ :
โก๏ธ Custom AI chatbots for websites, mobile applications, and SaaS platforms
โก๏ธ RAG-powered knowledge-base chatbots with grounded and source-cited answers
โก๏ธ AI customer support bots with ticket creation, escalation, and human handoff
โก๏ธ Internal AI assistants for policies, SOPs, product information, and company knowledge
โก๏ธ AI agents that call APIs, query databases, update CRMs, and automate workflows
โก๏ธ Voice AI receptionists for incoming calls, qualification, booking, rescheduling, and routing
โก๏ธ Educational AI tutors and assistants with personalized, context-aware conversations
โก๏ธ Multilingual and multichannel chatbots for web, WhatsApp, Slack, Teams, SMS, and voice
โก๏ธ ChatGPT, Claude, Gemini, and open-source LLM integrations
โก๏ธ Chatbot audits, hallucination reduction, prompt optimization, evaluation, and performance improvement
โ ๐๐ ๐๐ก๐๐ญ๐๐จ๐ญ ๐๐๐๐ก๐ง๐จ๐ฅ๐จ๐ ๐ฒ ๐๐ญ๐๐๐ค ๐ ๐๐๐ญ๐๐ง ๐๐ฌ๐ :
โก๏ธ ๐๐๐๐ฌ: OpenAI GPT, Anthropic Claude, Google Gemini, and open-source Llama models
โก๏ธ ๐๐ ๐๐ง๐ญ๐ฌ ๐๐ง๐ ๐จ๐ซ๐๐ก๐๐ฌ๐ญ๐ซ๐๐ญ๐ข๐จ๐ง: LangChain, LangGraph, LlamaIndex, OpenAI Agents SDK, tool calling, function calling, agentic workflows, and Model Context Protocol (MCP)
โก๏ธ ๐๐๐ ๐๐ง๐ ๐ฌ๐๐๐ซ๐๐ก: Semantic search, hybrid search, metadata filtering, reranking, query rewriting, GraphRAG, contextual retrieval, and citation generation
โก๏ธ ๐๐๐๐ญ๐จ๐ซ ๐๐๐ญ๐๐๐๐ฌ๐๐ฌ: Pinecone, Qdrant, Weaviate, PostgreSQL/pgvector, Chroma, and FAISS
โก๏ธ ๐๐๐๐ค๐๐ง๐ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ: Python, FastAPI, Node.js, TypeScript, REST APIs, WebSockets, webhooks, PostgreSQL, and Redis
โก๏ธ ๐๐ฎ๐ฌ๐ข๐ง๐๐ฌ๐ฌ ๐ข๐ง๐ญ๐๐ ๐ซ๐๐ญ๐ข๐จ๐ง๐ฌ: CRM systems, help desks, calendars, payment systems, e-commerce platforms, Google Drive, Notion, Slack, Microsoft Teams, Twilio, WhatsApp, and custom APIs
โก๏ธ ๐๐๐ฉ๐ฅ๐จ๐ฒ๐ฆ๐๐ง๐ญ: Docker, AWS, Azure, Google Cloud, Vercel, CI/CD, monitoring, tracing, and scalable cloud architecture
โก๏ธ ๐๐ฎ๐๐ฅ๐ข๐ญ๐ฒ ๐๐ง๐ ๐ฌ๐๐๐๐ญ๐ฒ: Guardrails, permission-aware retrieval, prompt-injection protection, PII handling, human approval flows, automated evaluations, and LLM observability
โ ๐๐ฒ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ ๐๐ฉ๐ฉ๐ซ๐จ๐๐๐ก :
โช๏ธ Clarify โฏโฏ use case, users, data, integrations, success metrics
โช๏ธ Design โฏโฏ conversation flow, RAG pipeline, agent logic, memory, fallbacks
โช๏ธ Build โฏโฏ integrate into your product & systems
โช๏ธ Test โฏโฏ accuracy, retrieval, latency, security, edge cases
โช๏ธ Deploy โฏโฏ monitor & refine using real usage data
Send me your chatbot use case, target users, data sources, required integrations, preferred communication channels, and whether you need an MVP or production deployment.
Letโs build an AI chatbot that is accurate, useful, measurable, and ready for real-world users.
Retrieval Augmented Generation
Chatbot
Chatbot Development
Chatbot Integration
LangChain
Python
Vector Database
Generative AI
AI Bot
Natural Language Processing
AI Agent Development
Conversational AI
OpenAI API
API Integration
AI Chatbot
LLaMA
Twilio API
Automatic Speech Recognition
Chatbot Prompt
Node.js
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