H.M. Tajul Islam Tanim

I'm a Physics undergraduate at the University of Rajshahi, Bangladesh, working at the intersection of physics, mathematics, and computing.

Rather than learning technologies only through tutorials, I prefer building things from the ground up - from numerical solvers and multi-node computing clusters to production web applications and self-hosted infrastructure.

Currently exploring:

• Scientific computing & numerical methods
• High-performance and parallel computing
• Systems programming
• Full-stack application architecture
• Self-hosted infrastructure & DevOps
• Machine learning
• Mathematical modeling and computational physics

For more go to this section.

My physics background naturally pulled me toward computational methods.

Scientific Computing Numerical methods for mathematical and physical problems - with a particular interest in ODE systems, numerical integration, optimization, and computational modeling.

High-Performance Computing Experimenting with building and managing a small multi-node HPC environment, with a long-term goal of scaling computational physics problems across multiple CPU cores and machines.

A programming language ecosystem featuring a tree-walk interpreter built from scratch in C++, a native code formatter (vspfmt), and a dedicated VS Code extension with TypeScript-style syntax highlighting.

• Lexical Analysis & Parsing - Tokenizer and recursive-descent parser generating clean Abstract Syntax Trees (AST).
• Runtime & Execution - C++ tree-walk interpreter evaluating expressions and handling dynamic variable scoping.
• VS Code Integration - Custom extension providing syntax highlighting, auto-formatting via vspfmt, and language tooling.
• Documentation & CI/CD - Automated site deployment via GitHub Pages and automated cross-platform builds.

Focus: language design · AST evaluation · VS Code extension development · C++ system programming

🌐 Documentation · 🖥️ Source · 🧩 VS Code Extension for language support

A production-oriented, self-hosted management platform for diagnostic centers.

• Patient and invoice management
• Diagnostic test management
• Doctor commissions and discounts
• Payment and due tracking
• Sales and financial reporting
• Audit logging & role-based administration
• Printable invoices and reports

Also involved database migrations, deployment, reverse proxies, Windows packaging, backups, and self-hosted infrastructure - making it as much a systems project as a web application.

🔗 Live Demo

An anonymous peer-to-peer chat experience built around a playful token economy - match with a random fox, chat for a while, earn berries, and come back for more.

• Instant Matching - find and connect with a random anonymous fox
• Berry Economy - earn berries by chatting, lose them when skipping
• Timed Chats - 2-minute initial sessions with 5-minute extensions
• Real-time Messaging - instant messages, typing indicators, and reactions
• Persistent Sessions - rejoin a conversation after an accidental disconnect
• Responsive UI - designed for mobile, tablet, and desktop
• Anonymous by Design - no accounts, no unnecessary tracking

Focus: real-time systems · WebSockets · anonymous matching · state management

🔗 Live Demo 🖥️ Source

For more projects visit my repositories.

Languages

Web & Application Development

Databases & Backend

Scientific Computing & Mathematics

Systems & CLI

Infrastructure & DevOps

Version Control & Development Tools

Scientific Computing
   ├── Numerical ODE Solvers
   ├── Parallel Computing
   ├── MPI / Distributed Systems
   └── Computational Physics


Systems Programming
   ├── Rust
   ├── Linux
   └── Performance Engineering


Production Software
   ├── Next.js
   ├── PostgreSQL
   ├── Docker
   └── Self-hosted Infrastructure

I'm especially drawn to the overlap of these areas - using low-level, high-performance computing ideas to solve real scientific and engineering problems.

Learn the theory. Build the system. Measure the result.

I like understanding what's happening underneath the abstraction - whether that's a numerical algorithm, a database query, a network request, or a CPU instruction.