Md Sahaduzzaman

Full-Stack Developer | MERN Stack | Custom Solutions | eCommerce Development

I am a full-stack developer with 2+ years of experience in building modern web applications using Next.js, Node.js, MongoDB, and AI-driven solutions. I specialize in eCommerce platforms, healthcare applications, and real-time web services, ensuring secure and scalable development.

💡 Skills & Expertise:

✅ Frontend: React.js, Next.js, Tailwind CSS, TypeScript

✅ Backend: Node.js, Express.js, MongoDB, REST APIs, WebSockets

✅ AI Integration: FastAPI, AI-powered digital prescriptions, OpenAI APIs

✅ Real-time Features: WebRTC, Socket.IO for video calls & notifications

✅ Cloud & DevOps: Azure, Cloudinary, Docker

✅ Deployment & CI/CD: Set up DevOps for deployment in Azure, Heroku using GitHub Actions & CI/CD pipelines

🎯 Work Experience:

Software Engineer | 4j Traders Ltd | Dhaka, Bangladesh | [July 2025 - Dec 2025]

• (Technologies: NestJS, TypeScript, PostgreSQL, Prisma, Next.js, Docker)
• Engineered and deployed a scalable, containerized backend (NestJS/PostgreSQL/Prisma) for a high-value e-commerce platform, handling product inventory, complex user roles (superAdmin, admin, customer), and ensuring transactional integrity for all order processes.
• Optimized core database performance by implementing a centralized query structure and performing schema normalization, which prepared the system for high-volume data operations across products, projects, and orders.
• Developed and secured a full project management CRUD API that allows administrators to dynamically publish interior design case studies and manage media assets, restricting access based on granular RBAC (Role-Based Access Control) enforced via JWT authentication and NestJS Guards.
• Established robust DevOps and CI/CD pipelines using Docker and GitHub Actions, drastically improving deployment reliability and enabling consistent environment setup (Local, Staging, Production) for future team collaboration

Backend Engineer | Rushkat Company Ltd | Remote [South Korea] | [Oct 2024 - Jun 2025]

• Developed and optimized scalable backend services for a 3D asset store using TypeScript, Express.js, and Prisma ORM, significantly improving system performance through strategic code refactoring.
• Designed and implemented RESTful APIs for asset management and user interactions; managed PostgreSQL DB and integrated Redis to accelerate high-traffic endpoints
• Ensured production readiness by implementing robust security protocols, collaborating with cross-functional teams to deliver key features, and conducting thorough testing and performance tuning. 

Backend Developer Intern @ PeopleNTech | [ Mar 2023 - May 2024 ]

• Developed and optimized REST APIs for scalable web applications for the internal client.
• Set up DevOps for deployment in Azure and Heroku using GitHub Actions & CI/CD.
• Designed secure authentication and role-based access control (RBAC).

Independent Client Projects (2024-Present)

• AI-Powered Digital Prescription System for DaktarBary Health
• Built an AI-driven prescription generator for doctors.
• Integrated FastAPI for AI processing and MongoDB for secure data storage.
• ECommerce Platform for Abir Company Ltd.
• Developed a full-stack Next.js + Node.js eCommerce site.
• Integrated Stripe for payments and real-time inventory tracking.

🔗 Portfolio & Work Samples:

• Online Doctor Consultation Platform (AI + WebRTC): https://odcp.vercel.app/
• eCommerce Web App (Next.js + Node.js + Stripe): https://minishopbd.netlify.app/
• GitHub: https://github.com/sahadcse/