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litch07/README.md

Sadid Ahmed

Full-Stack Developer | Competitive Programmer

Building scalable web applications with modern technologies

LinkedIn Email GitHub Codeforces LeetCode


👨‍💻 About Me

Full-stack developer with experience in building production-grade web applications, educational management systems, and desktop tools. Strong foundation in backend architecture, database design, and modern frontend frameworks. Passionate about writing clean, maintainable code and solving complex problems through competitive programming.

Currently focused on scalable system design, API architecture, and database optimization while continuously improving problem-solving skills through competitive programming platforms.


🛠️ Tech Stack

Languages

Java JavaScript C C++ SQL

Frontend Development

React Next.js Tailwind CSS HTML5 CSS3

Backend Development

Node.js Express.js Prisma JWT

Databases

MySQL PostgreSQL

Tools & Technologies

Git Docker Linux VS Code


🚀 Featured Projects

Digital Certificate Issuance & Verification System for Educational Institutions

A comprehensive full-stack platform for managing educational credentials with multi-tenant architecture and secure verification workflows.

Next.js Node.js Express.js MySQL Prisma JWT

Highlights:

  • 🔐 Multi-role authentication system (Student, University, Verifier, Admin)
  • 🎫 Transaction-safe serial generation with tamper-proof certificate IDs
  • ✅ Two-factor verification for privacy-preserving credential checks
  • 📧 Email verification with 6-digit OTP and admin approval workflow
  • 🔒 Privacy controls: toggle certificate sharing and manage access requests
  • 📊 12 normalized tables (3NF) with 6 optimized database views
  • 🌓 Professional UI with dark mode support

Full-Stack Commerce System for Modern Bengali Jewelry & Lifestyle Brands

Production-minded e-commerce platform with complete product lifecycle management, from catalog to fulfillment and post-purchase support.

Next.js React Express.js Prisma PostgreSQL Docker

Highlights:

  • 🛍️ Product discovery with advanced filters and real-time stock visibility
  • 💳 Dynamic discount system with persistent cart and checkout flow
  • 👤 Customer accounts with order history and saved addresses
  • 📦 Order tracking with receipt generation and status updates
  • 📊 Admin dashboard with inventory management and sales analytics
  • ⭐ Product reviews and Q&A with admin moderation
  • 🐳 Docker Compose setup for consistent development environment

Desktop Academic Performance Tracker for UIU Students

Modern Java Swing application for calculating term GPA and cumulative CGPA with support for retake courses and integrated grading scale reference.

Java Swing

Highlights:

  • 📊 Dual calculation: term GPA and updated CGPA in one step
  • 🔄 Retake course handling with proper grade replacement logic
  • ➕ Dynamic course management (up to 15 courses per semester)
  • 📚 Built-in grading scale reference (UIU standard)
  • 🖥️ Fullscreen mode support with keyboard shortcuts
  • 🔒 Zero data storage for complete privacy
  • 📦 Portable Windows executable with bundled JRE

🎯 Current Focus

  • ⚡ Building scalable full-stack applications with clean architecture
  • 🏗️ Designing RESTful APIs with secure authentication and authorization
  • 📊 Database modeling, normalization, and query optimization
  • 🧩 Practicing competitive programming and advanced data structures
  • 🐳 Exploring DevOps practices with Docker and containerization
  • 🎨 Learning system design patterns and microservices architecture

📊 GitHub Statistics

GitHub Stats Top Languages

💼 Open to collaboration and new opportunities

Let's build something amazing together!

Pinned Loading

  1. rupantorii-system rupantorii-system Public

    Rupantorii is a full-stack e-commerce platform with a modern storefront and admin panel, built using Next.js, Express, Prisma, and PostgreSQL, focused on clean architecture and real-world commerce …

    JavaScript 1

  2. banking-system-java banking-system-java Public

    Object-Oriented Programming (OOP) Lab Project developed as part of the United International University (UIU) undergraduate curriculum, implemented using Java.

    Java

  3. eduauth-registry eduauth-registry Public

    🎓 Digital certificate issuance and verification system for universities. React + Node.js + MySQL with JWT auth, email verification, and admin approval workflow.

    JavaScript

  4. quiz-master-java quiz-master-java Public

    Interactive quiz application with Material Design UI. Create and manage quizzes through an intuitive GUI. Built with Java Swing for OOP Lab at UIU.

    Java

  5. uiu-cgpa-calculator-swing-java uiu-cgpa-calculator-swing-java Public

    A Java Swing–based CGPA Calculator for United International University (UIU), developed as an Object-Oriented Programming (OOP) Lab Project.

    Java