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HimasagarU/README.md

Hi there, I'm Himasagar U

ML/AI Engineer · Python · PyTorch · LangGraph · FastAPI

Designing and building machine learning systems — from model training to production APIs.

About Me

  • Building ML systems with a focus on agentic AI, recommender systems, NLP/LLMs, and multimodal learning
  • Honors research in EEG-based attention classification and cross-subject biomarker discovery
  • Experience deploying end-to-end pipelines: data ingestion → model inference → REST API
  • Interested in LangGraph agents, RAG systems, Graph Neural Networks, and signal processing
  • Based in Chennai, Tamil Nadu, India

Featured Projects

Agentic AI & LLM Systems

Project Description Tech
LangGraph-ReAct-Reasoning-Agent Tool-augmented reasoning agent using LangGraph ReAct loop with intent classification, multi-step reasoning, and a self-critique review pass. Supports Tavily search, Wikipedia lookup, and calculator tools. SSE streaming + FastAPI frontend. Python, LangGraph, LangChain, Groq, Tavily, FastAPI
Arxiv-RAG-Assistant Research assistant using hybrid search (BM25 + dense embeddings + cross-encoder reranking) to answer questions with citations from scientific papers. Powered by Llama 3 via Groq. Python, FastAPI, BM25, ChromaDB, RAG, Llama 3

Recommender Systems & Multimodal AI

Project Description Tech
FasRec-AI-Engine Multimodal fashion recommender for 44k+ products using CLIP image embeddings, SBERT text embeddings, and FAISS HNSW ANN search. FastAPI backend with Cloudflare R2 storage. Deployed on Render. Python, PyTorch, CLIP, SBERT, FAISS, FastAPI
Simple-Arxiv-Paper-Recommender NLP prototype recommending related arXiv papers via TF-IDF and embedding-based abstract similarity Python, NLP, TF-IDF, Embeddings
Simple-Fashion-Recommendation-System-Phase1 Content-based fashion recommender using K-Means clustering on product attributes and image features Python, K-Means, Jupyter

Data Engineering & ML Pipelines

Project Description Tech
Loan-Collections-Recovery-Engine End-to-end SQL + ML pipeline on the Home Credit dataset. Warehouse design (staging → dims → facts → analytical marts), delinquency feature engineering, recovery propensity scoring with LightGBM, and dashboard-ready Power BI exports. Python, PostgreSQL, SQLAlchemy, LightGBM, scikit-learn, pandas

EEG & Signal Processing

Project Description Tech
AttentionEEG Attention classification across multimodal EEG stimuli (audio, video, text) Python, MNE, Scikit-learn, Jupyter
Modality-Invariant Biomarker Discovery Identifying stable EEG biomarkers for attention that generalize across audio, video, and text modalities Python, EEG Signal Processing

Graph Neural Networks

Project Description Tech
DbPedia Entity Classification (GCN & GraphSAGE) Multiclass text classification on DBpedia-14 using GCN and GraphSAGE architectures Python, PyTorch Geometric, Jupyter

Computational Biology

Project Description Tech
Protein Remote Homology Detection Remote protein homolog detection via ESM-2 sequence embedding alignment and Smith-Waterman scoring Python, ESM-2, Sequence Embeddings

Web & Full-Stack

Project Description Tech
EstateCraft Full-stack MERN platform for property listings with Stripe payments and role-based auth React, Redux, Node.js, MongoDB, Stripe
NourishNest Nutrition and diet planning platform with recipe database and meal tracking via Spoonacular API Node.js, Express, MongoDB, EJS
Smart-Scheduler Context-aware task scheduling assistant Python, JavaScript
Smart-Pg-Review-Platform PG accommodation review and discovery platform TypeScript

Security

Project Description Tech
CSRF Attack & Defense Demo Demonstrates CSRF vulnerability and OWASP-compliant defense mechanisms Node.js, EJS

Tech Stack

Languages Python JavaScript TypeScript SQL

ML / DL / AI PyTorch Scikit-learn HuggingFace LightGBM FAISS OpenAI CLIP

Agentic & LLM Frameworks LangGraph LangChain Groq

Backend & APIs FastAPI Node.js Express

Frontend React Redux

Databases & Storage PostgreSQL MongoDB ChromaDB

Tools & Deployment Docker GitHub Render Vercel

GitHub Stats

HimasagarU's GitHub Stats Top Languages GitHub Streak

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  1. Arxiv-RAG-Assistant Arxiv-RAG-Assistant Public

    AI Research Assistant that combines Semantic Search, Keyword Matching, and Reranking to provide accurate, cited answers from scientific papers. Powered by FastAPI & Llama 3

    Python

  2. FasRec-AI-Engine FasRec-AI-Engine Public

    AI-powered fashion recommendation engine combining CLIP (visual) and SBERT (text) embeddings with FAISS HNSW search. Features a FastAPI backend, multimodal fusion for 44k+ products.

    Python 2

  3. EstateCraft EstateCraft Public

    EstateCraft: A MERN-based platform for buying, selling, and advertising properties, offering seamless interactions for admins, employees, sellers, and buyers. Secure, responsive, and built for real…

    JavaScript 1 1

  4. DbPedia-Enitity-Classification-using-GCNs-and-GraphSage DbPedia-Enitity-Classification-using-GCNs-and-GraphSage Public

    This repository presents a solution for multiclass text classification on the DBpedia-14 Ontology Classification Dataset using two advanced Graph Neural Network (GNN) architectures: Graph Convoluti…

    Jupyter Notebook

  5. AttentionEEG AttentionEEG Public

    The code and data of Attention Analysis using EEG data

    Jupyter Notebook 2

  6. NourishNest NourishNest Public

    A comprehensive nutrition and diet planning platform with recipe database, meal planning, and nutrition tracking

    EJS