I will build custom rag agentic systems for your data


About this gig
About This Gig
I build secure RAG system architectures, autonomous AI agents, and custom RAG chatbot tools natively in TypeScript and Node.js. I write clean backend code that connects your private files directly to LLMs, delivering fast, accurate answers without hallucinations.
What You Get
- Custom RAG System: High-performance data pipelines to parse your PDFs, CSVs, and databases, linking them to a secure vector database like Supabase pgvector or Pinecone for real-time document search.
- Structured AI Agents: Multi-step business logic workflows built with LangGraph and LangChain to ensure your agents perform tasks predictably and reliably every single time.
- RAG Chatbot UI: A secure, custom-built API backend paired with a minimal, clean user dashboard designed in React and Next.js.
The Stack
- Core AI Tools: LangChain, LangGraph, Ollama, LlamaIndex
- Data Storage: PostgreSQL, Supabase pgvector, Pinecone, FAISS
- Languages & Web: TypeScript, Node.js, Python, Next.js, React, Docker
Send me a message with a quick overview of your data format and what you want to automate. Let's map out the technical architecture before you place an order.
Get to know Kalu Eke
Full Stack Developer
- FromNigeria
- Member sinceMay 2026
Languages
English
FAQ
How do you stop the AI from making things up?
By restricting its search space. I build custom RAG pipelines that force the LLM to only answer using the exact snippets we retrieve from your database. If the answer is not in your documents, the model is programmed to simply say it does not know.
What kinds of files can the AI actually read?
Almost anything your business uses daily. I write TypeScript parsers to clean and extract text from PDFs, spreadsheets, CSVs, live API feeds, or raw SQL databases so the AI can search through them accurately.
What is the difference between a simple wrapper and a custom RAG system?
A basic wrapper just sends a prompt directly to an LLM, which leads to hallucinations and leaked data. A custom RAG system uses a dedicated pipeline to search your files first, extracts the most relevant context, and feeds only that secure data to the model for an accurate response.
Which vector database do you recommend for this setup?
I highly recommend PostgreSQL with the Supabase pgvector extension because it lets you keep your relational data and your vector embeddings in the same place. If your project scale requires a dedicated external vector database, I also work natively with Pinecone and FAISS.
How do you ensure your AI agents perform tasks predictably?
Instead of letting the LLM freely decide what to do next, I build structured state machines using LangGraph and LangChain. This forces the AI agents to follow strict rules, validation steps, and fallback paths, keeping their behavior deterministic.
Can you build a web interface for my RAG chatbot?
Yes. I write the core backend in Node.js, TypeScript, or Python, and then build a fast, minimal user interface using React and Next.js. This gives your team a clean web dashboard to interact with the RAG chatbot daily.
Will I be hit with high monthly software bills?
I build your application using open-source tools like PostgreSQL and LangChain to avoid costly third-party platform subscriptions. You only pay for your actual cloud hosting and your direct LLM token usage.
Can your AI agents integrate with my existing software?
Yes. I write custom API endpoints using TypeScript and Node.js. This allows your autonomous AI agents to trigger actions, update records, and query data inside your current CRM, ERP, or internal databases.
