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I will build an ai agent, chatbot and automation with langchain rag

M
marcus_1823
M
marcus_1823
Marcus
build an ai agent, chatbot and automation with langchain rag
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build an ai agent, chatbot and automation with langchain rag
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build an ai agent, chatbot and automation with langchain ragbuild an ai agent, chatbot and automation with langchain ragbuild an ai agent, chatbot and automation with langchain rag

About this gig

Need a custom AI agent, chatbot, or RAG system that actually works in production? You're in the right place.

I build intelligent AI solutions end-to-end from the model to a deployed, working product. Not just a script you can't run.

What I can build for you:

Custom AI chatbots (GPT, Claude, open-source LLMs)

RAG systems that answer from YOUR data (PDFs, docs, databases)

Multi-agent AI systems with tool-calling & automation

Full integration into your app, website, or workflow

Production deployment live and ready to use

Why work with me?

Unlike most sellers, I cover the full stack: AI + backend (Python/FastAPI) + web (Next.js/React). That means I deliver a complete product, not just one piece. I also fine-tune and optimize models for accuracy and low cost.

My tech: Python, LangChain, LangGraph, RAG, vector databases, FastAPI, Next.js, Supabase.

How it works:

  1. You message me with your idea
  2. I send a clear plan & quote
  3. I build, test & deliver
  4. Free revisions until it works

Have a question or a custom request? Message me before ordering I reply fast and I'm happy to scope your project.

Let's build something great.

  • AI engine

    • GPT
    • Langchain
    • Claude

  • Programming language

    • JavaScript
    • Python
    • TypeScript
    • React

Get to know Marcus

Marcus

AI Engineer building LLM Agents Chatbots and RAG Systems

  • FromVietnam
  • Member sinceFeb 2026
  • Avg. response time1 hour

  • Languages

    Vietnamese, English, Japanese
AI Engineer specializing in LLM agents, chatbots, and RAG systems — built and deployed in production. I work end-to-end: fine-tuning models, building multi-agent systems with LangChain and LangGraph, and shipping them as complete products with FastAPI and Next.js. Unlike most developers who handle only one piece, I cover the full stack — from the AI model to the deployed web app. I've built a production multi-agent SaaS platform and fine-tuned Vietnamese LLMs reaching 94% accuracy. Need a smart chatbot or a RAG system that works? Message me — I reply fast.

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