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$
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I will build a custom ai agent with langgraph, langchain and openai
Umair
About this gig
Need an AI agent that actually does the work, not just chats? I build custom AI agents in Python with LangGraph, LangChain and OpenAI or Claude that call your tools, use your data and follow clear rules.
What you get:
- A working agent that uses tools: APIs, databases, search, email or your CRM
- Memory and a clear flow, so it stays on task
- A FastAPI endpoint you can plug into your app
- Clean, commented source code and a setup guide
Stack: Python, LangGraph, LangChain, OpenAI, Claude, FastAPI, PostgreSQL, vector databases (Pinecone, Qdrant, Milvus), Docker, Next.js.
How we work:
1. You share the task and the tools the agent needs
2. I confirm the scope and agent design before I start
3. I build, test with real examples and send a demo
4. You review, I refine, then hand over the code
Why me: I'm a Senior Software Engineer with 4+ years of building AI products. I've built multi-agent systems with a router that sends each request to the right agent, and agents that draft emails with a human approval step.
Not sure which package fits? Send me a message before ordering and I'll recommend one.
Get to know Umair
Umair
AI Agents, RAG Chatbots, n8n and FastAPI Developer
- FromPakistan
- Member sinceFeb 2026
- Avg. response time1 hour
Languages
Urdu, English
I'm Umair, a Senior Software Engineer with 6 years of building AI products and full-stack apps. I build custom AI agents with LangGraph and LangChain, RAG chatbots that answer from your own documents, n8n automations, and FastAPI or Django backends with Next.js frontends. I've built multi-agent systems, a RAG chat platform with guardrails and role-based access, and production APIs with Docker and CI/CD. You get clean code, clear updates and a working demo before handover. Message me with your idea and I'll suggest the simplest setup that works.
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FAQ
Which AI models can you use?
OpenAI, Claude, or open-source models through Ollama. I'll suggest one based on your budget, privacy needs and the task.
Do I need my own API keys?
Yes. Model and tool usage is billed to your own accounts, so you keep control of costs and data. I'll show you where to add the keys.
Can the agent connect to my existing systems?
Yes, if they have an API or database access: CRMs, email, Slack, Google Sheets, your own backend and more.
What is the difference between an agent and a chatbot?
A chatbot answers questions. An agent takes actions: it calls tools, makes decisions in steps and completes a task.
Will I be able to change it later?
Yes. You get the full source code, a setup guide and a clear structure, so you or another developer can extend it.
