AI engineering projects

Agentic AI, LLM features, retrieval and evaluation work. Built by Chiranjeev Thomas, senior full-stack engineer, agentic ai.

“spicy veg snacks under ₹200”

LLM

{ diet: "veg",
  tags: ["spicy"],
  price: { lte: 200 } }✓ schema checked

Elasticsearch

At Grabbit

AI engineering
Full-stack

Conversational product search with an LLM

Shoppers describe what they want in plain language; an LLM turns it into an Elasticsearch query. Non-technical users can now run searches that used to need filters and exact keywords.

LLM
Elasticsearch
Spring Boot
React Native
AWS

How it works

Demo: in Grabbit app · Code: private

InvoiceChaser walkthrough: client pushback is detected, a late fee is calculated and a firmer escalation draft waits for the freelancer to approve

Live

AI engineering
Full-stack

InvoiceChaser — payment-recovery agent

Chases overdue invoices for freelancers through three escalation levels. Tools are gated per level, and nothing is sent without human approval.

LangChain
LangGraph
Groq · Llama 3.3 70B
FastAPI
React 19
MCP
Tavily
Vercel

How it works Live demo GitHub

Document Q&A assistant demo: a question about AI engineering skills is answered from 28 indexed documents with a View Retrieved Context toggle, and an off-topic weather question is declined instead of guessed

Open source

AI engineering

Document Q&A assistant (agentic RAG)

Upload PDFs and chat with them. The model decides when to search, results are reranked, and every answer shows its sources.

LangChain
Pinecone
bge reranker
Groq · Llama 3.3 70B
Node · Express

How it works GitHub

run #2043 · level 2 dispute

prompt (level 2 tone)

calculate_late_fees

draft_formal_demand_letter

human approval

✓ tone✓ tools✓ approval

In progress

AI engineering

Agent observability & evals for InvoiceChaser

Per-step tracing of every agent run, plus a golden-set eval that checks tone and tool choice at each escalation level before a prompt change ships.

Tracing
Evals
Python

How it works GitHub

Writing on AI engineering

Your agent shouldn’t know about tools it can’t use yetState-based tool gating in LangChain — how InvoiceChaser keeps a debt-collection agent polite until escalation is earned, by changing what the model can see rather than what it’s asked to do.