I’m an Independent Information Security Researcher and System Administrator with 6+ years of hands-on experience in Cyber Security, Penetration Testing, Linux System Administration, Web Hosting Infrastructure, and Server Engineering.

My work spans from finding security vulnerabilities in web applications and APIs to designing, deploying, securing, and maintaining production server infrastructure.

I enjoy understanding how systems work — and more importantly, how they can fail.

• 🔐 Independent Security Researcher & Bug Bounty Hunter
• 🖥️ Linux System Administrator & Server Engineer
• 🧪 Web Application & API Security Researcher
• 🌐 Network & Infrastructure Security
• ☁️ Cloud & Virtualization
• 🐧 Linux / Unix System Administration
• 🧩 WordPress & Web Infrastructure Security
• ⚙️ cPanel / WHM / CloudLinux / LiteSpeed Infrastructure
• 🚀 Hosting Infrastructure & Server Optimization
• 💻 Full-stack scripting and automation for infrastructure
• 🔎 Interested in vulnerability research, offensive security, and system hardening

• Web Application Penetration Testing
• API Security Testing
• Vulnerability Research
• Bug Bounty Hunting
• Authentication & Authorization Testing
• Business Logic Testing
• Security Misconfiguration Analysis
• Server & Infrastructure Security
• Security Automation

• Linux Server Administration
• cPanel / WHM
• CloudLinux
• LiteSpeed Enterprise
• Apache / Nginx
• MariaDB / MySQL
• DNS, SPF, DKIM & DMARC
• Mail Infrastructure
• Backup Infrastructure
• Server Monitoring & Optimization
• Virtualization & VPS Infrastructure
• Network Routing & Security

I also work extensively with production hosting infrastructure, including:

• Shared Hosting
• Reseller Hosting
• VPS Infrastructure
• BDIX Infrastructure
• Dedicated Servers
• KVM Virtualization
• NVMe / SSD Storage
• High-performance web servers
• Infrastructure automation

Burp Suite Nuclei httpx Nmap ffuf SQLMap OWASP Tools

Linux CloudLinux cPanel WHM LiteSpeed Apache Nginx

KVM Virtualizor VirtFusion

PHP Python JavaScript Bash HTML CSS

MySQL MariaDB

MikroTik TCP/IP DNS VPN Routing Firewall

I build and maintain infrastructure-oriented projects focused on:

• Server automation
• Security hardening
• Hosting automation
• Monitoring and diagnostics
• Performance optimization
• Linux administration
• Web application security
• Infrastructure tooling

I also run and work with production hosting infrastructure through PrenHost, providing web hosting, VPS, reseller hosting, BDIX infrastructure, and related services.

My security research focuses heavily on real-world systems rather than only theoretical security.

Areas I regularly explore include:

• Web applications
• APIs
• Authentication systems
• Access control
• Server configurations
• Linux environments
• Hosting environments
• WordPress ecosystems
• Cloud infrastructure
• Network services

I enjoy turning security findings into practical solutions — from identifying the vulnerability to understanding its root cause and implementing a reliable fix.

• Advanced Web Application Security
• API Security
• Cloud Security
• Linux Kernel & System Security
• Infrastructure Security
• Server Performance Engineering
• Security Automation
• AI-assisted Security Research
• DevSecOps

• 🔐 Penetration Testing
• 🐛 Bug Bounty
• 🌐 Web & API Security
• 🐧 Linux System Administration
• 🖥️ cPanel / WHM / CloudLinux
• ⚡ LiteSpeed & Web Server Optimization
• ☁️ VPS & Hosting Infrastructure
• 🌎 Network & Server Architecture
• 🔧 Server Troubleshooting & Automation

• 🐦 Twitter/X: @Sajibekantibd
• 💻 GitHub: Sajibekanti

Understand the system. Break it responsibly. Secure it properly.

I believe the best way to build secure infrastructure is to understand how attackers think, how systems fail, and how those weaknesses can be turned into reliable defensive solutions.

I spend a lot of my time working between two worlds:

Security Research 🔐
Finding vulnerabilities, understanding attack techniques, testing applications, and improving security.

Infrastructure Engineering 🖥️
Building servers, managing Linux environments, optimizing performance, troubleshooting production systems, and automating repetitive work.

That combination gives me a practical perspective:

Security is not only about finding vulnerabilities — it's also about understanding the infrastructure behind the application.

• Security Research
• Bug Bounty Collaboration
• Infrastructure Projects
• Open Source Projects
• Security Automation
• Technical Collaboration

If you're working on something interesting in Cyber Security, Linux, Infrastructure, or Web Security, feel free to reach out.

© Sajibe Kanti — Security Researcher | System Administrator | Infrastructure Engineer