Md. Mahamudul Hasan — AI/ML & Full-Stack Developer

Writing

What I learned and what broke along the way.

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Running RAG Completely Offline: What Nobody Tells You Until It Fails

I built two RAG systems that run entirely on CPU with no internet. Here's everything that broke — chunking strategies for equations, FAISS persistence quirks, LLM hallucination on domain-specific content, and the one config change that cut latency in half.

Jan 10, 2026 9 min read Read article

Computer Vision Accessibility

Hands-Free Mouse Control With a $0 Hardware Budget

The EAR algorithm, exponential smoothing, and why distinguishing an intentional blink from a reflex is harder than it looks.

Dec 28, 2025 6 min read

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LLMs Python

Why I Stopped Using Cloud LLMs and Built My Own

The real cost of cloud AI isn't money — it's the data leaving your machine. What I built instead, and what surprised me most.

Dec 15, 2025 7 min read

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Projects

Mental Health Prediction App

Predicts mental health risk using Random Forest and XGBoost — 85%+ prediction accuracy. Built with Streamlit for instant deployment.

Python Streamlit XGBoost

Physics Local Chatbot

RAG-based physics chatbot — fully offline, no API costs. FAISS semantic search over your own PDFs; no internet, no API key, no subscription.

Python RAG NLP

Head Tracking and Blink Detection screenshot

Head Tracking & Blink Detection

OpenCV + MediaPipe system enabling hands-free mouse control for motor-disabled users — no special hardware, works with any standard webcam.

Python OpenCV MediaPipe

LocalMind AI

Private self-hosted AI platform with multi-model LLM support, voice I/O, and RAG over PDFs — real-time streaming on CPU-only hardware, zero cloud dependencies.

Python FastAPI React Native LLM

Crawl4AI

Open-source, production-ready LLM-friendly web crawler — outputs clean Markdown and JSON directly ready for LLM ingestion, no manual cleaning required.

Python Web Crawling AI/ML

KrishiBot — AI Agriculture Assistant

Offline-first AI agriculture assistant — identify crop diseases from a single photo, get treatment advice and weather alerts, all in bilingual English & Bengali, no agronomist needed.

Python FastAPI Next.js LLM

About me

I build AI systems that run without internet, without GPUs, and without paid APIs — based in Dhaka, Bangladesh.

I build AI systems that work where most fail: no internet, no GPU, no paid APIs. Right now that means LocalMind AI (a fully private self-hosted LLM platform with voice I/O and RAG over PDFs), KrishiBot (an offline crop disease detector for Bangladeshi farmers in English & Bengali), and Head Tracking & Blink Detection (hands-free mouse control for motor-disabled users using just a webcam).

Most of my work sits where local LLMs meet real constraints — what it actually takes to run inference on CPU, build RAG pipelines without a vector database subscription, and ship accessibility tools to users who can't afford the cloud. I work mostly in Python, FastAPI, and React Native, with OpenCV, LangChain, Ollama, and FAISS underneath.

I write about what breaks along the way — deployment failures, RAG quirks, and the gap between a working demo and a working product.

Skills

Tools I use regularly and have shipped with.

Languages

Python JavaScript Java C C++ SQL

Frameworks & Libraries

FastAPI React Native Next.js LangChain LangGraph RAG PostgreSQL Redis

AI / ML Stack

HuggingFace Google Cloud AWS Vector Databases Fine-tuning FAISS OpenCV MediaPipe Whisper

Tools & Infrastructure

Git GitHub Actions Docker Kubernetes Terraform CI/CD MLflow Linux

Experience

Timeline of roles and education

AI/ML Research & Development

Independent Research · 2022–Present

Research

Engineered LocalMind AI — a fully offline LLM platform with voice I/O, RAG over PDFs, and cross-platform mobile support. Zero cloud dependencies.
Built KrishiBot, a bilingual crop disease detector for Bangladeshi farmers running entirely on local Ollama.
Developed a hands-free mouse system using OpenCV + MediaPipe — no special hardware, just a webcam.
Shipped end-to-end ML pipelines from data collection to deployment on consumer-grade CPU hardware.

Python FastAPI Ollama OpenCV LangChain FAISS

Open Source Contributor

GitHub Community · 2021–Present

Open Source

Built and maintain Crawl4AI — an LLM-friendly web crawler for building clean AI training datasets.
Documented all projects with architecture notes, build logs, and reproducible setup guides.
Maintained active repositories across ML, CV, RAG, and accessibility tooling.

Python Git Markdown GitHub Actions

B.Sc. Computer Science

North South University · 2021–2025

Education

Built capstone-level prototypes solving real accessibility and deployment constraints.
Applied ML coursework directly to production projects — not just academic exercises.
Focused coursework on Machine Learning, Computer Vision, and NLP.

ML CV NLP Data Structures Algorithms

Higher Secondary Certificate (Science)

Shah Makhdum College, Rajshahi · 2018–2020