Muhammad Qasim

DevShelf — Search Engine from First Principles (Java)

Mon, 01 Jan 0001 00:00:00 +0000

DevShelf is a distributed vertical search engine for Computer Science literature, engineered in Java without Lucene or ElasticSearch.

foldr — Intelligent File Automation CLI

Mon, 01 Jan 0001 00:00:00 +0000

foldr is a cross-platform Python CLI that organizes 240+ file types into 25 categories with background watch mode, full undo, deduplication, and custom category configuration. Published on PyPI.

MQNotebook — Enterprise-Grade RAG System

Mon, 01 Jan 0001 00:00:00 +0000

MQNotebook is a production-ready Retrieval-Augmented Generation (RAG) engine designed for messy, real-world enterprise documents.

Foldr — File Organizer CLI

Wed, 01 Apr 2026 00:00:00 +0000

A Python CLI tool for organizing files with undo, dry-run, and automation support.

BabyGPT: Generative Text Engine

Sat, 15 Nov 2025 00:00:00 +0000

A character-level Generative AI model built from scratch using Dual-Stack LSTMs and custom temperature sampling.

Designing RAG for Messy Enterprise Documents

Mon, 12 Jan 2026 00:00:00 +0000

Most RAG demos assume clean PDFs and perfect text extraction.

Enterprise reality is different:

scanned documents
broken layouts
missing metadata
inconsistent formats

This post explains how MQNotebook was designed with failure-first ingestion, OCR fallback, and reranking to maintain retrieval precision.

System Design: Engineering Feedback Loops

Sun, 08 Dec 2024 00:00:00 +0000

How DevShelf gets smarter using offline log analysis and behavioral re-ranking.

The Math Behind the Magic: Vector Space Models in Java

Sun, 10 Nov 2024 00:00:00 +0000

A deep dive into Cosine Similarity, TF-IDF, and how I built a ranking engine without Lucene.

From O(N) to O(1): Building a Java Search Engine from Scratch

Fri, 01 Nov 2024 00:00:00 +0000

How I built a Positional Inverted Index and TF-IDF ranker without using Lucene or Elasticsearch.