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Fiverr Pro
English
$
USD
I will build ai chatbot, ai software and ai agent using chatgpt, langchain, rag
Cullen J
About this gig
Launch your own AI chatbot or AI agent in days, not months.
I am an AI engineer building custom AI chatbots and autonomous AI agents powered by ChatGPT, OpenAI GPT, LangChain, and LangGraph trained on your data with RAG (Retrieval-Augmented Generation).
WHAT I BUILD:
AI chatbot for websites (customer support, lead generation, FAQ)
AI agent with tool-calling & autonomous decision making
RAG chatbot trained on your PDFs, docs, or website content
WhatsApp chatbot via Twilio / WhatsApp Business API
Customer support bot with conversation memory & history
TECH STACK: OpenAI GPT-4o / GPT-3.5 Turbo, LangChain, LangGraph, Next.js / React, Node.js + Express, PostgreSQL + pgvector, n8n, Vercel / AWS.
WHAT YOU GET: Source code, fast delivery, clean code, full documentation provided.
You get a production-ready, scalable AI solution. Perfect for startups, e-commerce, SaaS, and small businesses deploying reliable AI assistants. 24/7 support, lead generation, and automation included.
Ready to build your AI chatbot? Contact me and let's discuss your project today.
Get to know Cullen J
Cullen J
President DPA Software AI Agency
- FromUnited States
- Member sinceNov 2026
- Avg. response time1 hour
Languages
English
I am an AI-based chatbot and automation specialist with over 30 years of experience in digital strategy, user experience (UX), and information architecture. I have worked with over 50 brands on 5-8 figure projects, specializing in large language models, eCommerce, and accessibility consulting. My expertise lies in creating user-centric journeys and high-speed image processing architectures.
FAQ
Can you train the AI chatbot on my own data?
Yes, I use RAG (Retrieval Augmented Generation) with pgvector to train your bot on your PDFs, documentation, or website content for accurate, hallucination-free answers.
Will my AI chatbot work on WordPress, Shopify, or my existing website?
Yes, the chatbot is embeddable as a widget or iframe and integrates with any platform, website, or app.
Do I need an OpenAI API key?
Yes, you'll need an OpenAI API key, which I can guide you through. Cost is very low, roughly $1–5/month for small traffic.
Can you build a WhatsApp chatbot or AI voice agent?
Yes, I build WhatsApp chatbots via Twilio / WhatsApp Business API and AI voice agents using Retell AI, VAPI, or Twilio.
What happens if I'm not happy with the delivered result?
Free revisions are included as per the package, and the order stays open until you're satisfied.
Do you provide the source code?
Yes, you receive full ownership of the source code with every package, clean, well documented, and organized
Can you build an AI agent with tool-calling and autonomous decision making?
Yes, I build AI agents using LangChain, LangGraph, and OpenAI function calling for workflow automation, lead qualification, and autonomous task handling.
