# Sabbir Hasan - Portfolio & Professional Profile

> Personal portfolio, technical expertise, software projects, and IT services of Sabbir Hasan.

## About Sabbir Hasan
Sabbir Hasan is a CCNA-trained Network Engineer, Full-Stack Software Developer, and Cybersecurity Enthusiast based in Bangladesh. He specializes in designing robust network infrastructures, architecting high-performance web applications with Node.js and modern JavaScript, and implementing defensive security best practices.

- **Full Name**: Sabbir Hasan
- **Role**: IT Specialist, Full-Stack Developer & Network Engineer
- **Location**: Faridpur, Dhaka, Bangladesh
- **Website**: https://sabbirhasan.com
- **Email**: sabbirhasan800@gmail.com
- **LinkedIn**: https://linkedin.com/in/sabbir670
- **GitHub**: https://github.com/Sabbir-Hasan-670

## Core Competencies & Skills
- **Networking & Infrastructure**: CCNA (Cisco Certified Network Associate 200-301), Subnetting, Routing & Switching, VLANs, OSPF, Network Security, Linux Server Administration (Ubuntu/Debian), Nginx Reverse Proxy, Cloudflare CDN & DNS management, PM2 Process Management.
- **Full-Stack Web Development**: JavaScript (ES6+), Node.js, Express.js, MySQL / Relational Database Design, HTML5 / Semantic Web, CSS3 / Modern Glassmorphism & Responsive Design, RESTful APIs, WebSockets, Git & GitHub.
- **Cybersecurity & Ethical Hacking**: Penetration Testing Methodologies, Vulnerability Assessment, Network Hardening, Defensive Security, Malware Analysis Fundamentals.
- **Digital Solutions & SEO**: On-Page SEO, Technical SEO, Performance Optimization, Generative Engine Optimization (GEO), Graphic Design.

## Services Offered
1. **Full-Stack Web Application Development**: Custom web application development using Node.js, Express, and MySQL with responsive interfaces.
2. **Network Design & Server Configuration**: Configuring enterprise network topologies, VPS setup, Linux system administration, and Nginx reverse proxy.
3. **Cybersecurity & Infrastructure Hardening**: Server security, SSL/TLS configuration, vulnerability remediation, and DDoS protection via Cloudflare.
4. **Technical SEO & Web Performance Optimization**: Core Web Vitals optimization, Gzip/Brotli compression, image conversion to modern formats (WebP), caching strategies.

## Educational Background & Credentials
- **B.Tech in Computer Science & Engineering**: Lovely Professional University, India — Strong foundation in computing, distributed systems, networks, and software engineering.
- **CCNA 200-301 Training**: Cisco Certified Network Associate training completed (Cisco Networking Academy).
- **Applied Cybersecurity & Penetration Testing**: Hands-on coursework and applied labs in ethical hacking, vulnerability scanning, and network defense (TCM Security & Udemy).
- **Google Certification**: Digital Marketing and Technical SEO.

## Featured Projects & Applications
- **Aravals Server Management System**: Enterprise cloud server and hosting infrastructure manager.
- **Aravals Download Manager**: High-speed multi-threaded download manager utility.
- **Personal Portfolio & CMS**: Real-time content-managed portfolio platform with dual admin dashboard, dynamic blog engine, and learning resources.