I will build custom ai agents with langchain and fastapi


About this gig
Looking to automate business tasks with autonomous AI? Standard chatbots only generate text custom AI agents take action, query live databases, and run multi-step workflows.
I specialize in building production-grade AI agents and multi-agent systems using LangChain, LangGraph, and FastAPI.
What I Can Build:
Autonomous AI Agents: Agents equipped with custom tools (APIs, SQL databases, web scrapers).
Multi-Agent Workflows: Specialized LangGraph agents collaborating on complex pipelines.
FastAPI Backends: High-performance, async REST APIs with Pydantic validation and Swagger docs.
RAG & Vector Search: Secure connections to private vector databases (Pinecone, Supabase, Qdrant).
Enterprise Security: Rate-limiting, secure API handling, and clean modular Python code.
Tech Stack:
AI: LangChain, LangGraph, LlamaIndex, OpenAI GPT-4o, Claude 3.5, Llama 3
Backend: Python, FastAPI, Pydantic, Docker
Databases: PostgreSQL, Supabase, Pinecone, Redis
Get a scalable, secure, and production-ready LangChain FastAPI AI agent tailored to your workflow.
Please contact me before placing order to discuss your project.
Get to know Daud P
BIM Architecture and AI Automation Engineer
- FromPakistan
- Member sinceMay 2021
- Avg. response time1 hour
- Last delivery2 months
Languages
English, German, Italian, Arabic
FAQ
Do I need to provide my own API keys?
es. You will need to provide your own API keys for LLM providers (e.g., OpenAI, Anthropic) and third-party tools. I will guide you on setting these up safely.
Will the FastAPI backend be ready for my frontend?
Yes! Every project includes structured FastAPI endpoints with clear Pydantic models, CORS setup, and auto-generated Swagger (OpenAPI) documentation for easy frontend connection.
Can you deploy the AI agent to my cloud?
Absolutely. Premium packages include Docker containerization and deployment assistance to platforms like AWS, Render, Railway, or Vercel.
What is the difference between a chatbot and an AI agent?
A chatbot only replies with text. An AI agent uses tool calling to execute real actions—like querying a live database, triggering webhooks, searching the live web, or modifying files.

