Secure Your Infrastructure with
Sayan Chakraborty
Freelance Cybersecurity Consultant & Pentester
I help organizations identify and eliminate critical vulnerabilities before attackers can exploit them. Let's build resilient, attack-proof systems together.
About Me
As an independent **Security Consultant and Penetration Tester**, I specialize in breaking into networks and applications—legally—to show you exactly where your weaknesses lie. With over two years of intensive enterprise experience, I bring a hacker's mindset paired with enterprise-grade professionalism.
My methodology goes beyond automated scans. I leverage manual testing and custom exploit development to uncover deep-seated vulnerabilities that standard tools miss. If you need a partner to secure your next product launch or audit your existing infrastructure, I'm here to help.
- Available Globally (Remote)
- officialsayan002@gmail.com
- Proven Track Record
Consulting Services
Web & API Penetration Testing
Deep-dive security assessments of your web applications and APIs (REST, GraphQL) to identify injection flaws, broken access controls, and business logic errors.
Network Security Assessments
Comprehensive internal and external network pentesting to uncover misconfigurations, unpatched systems, and lateral movement paths.
Infrastructure & Cloud Audits
Security configuration reviews for AWS, Docker, Windows Active Directory, and Linux environments to minimize your attack surface.
Professional Experience
Security Consultant
Ampcus Cyber India
- Promoted from Cyber Security Analyst for high-impact project delivery.
- Handled multiple clients, performing web, network, and API penetration testing using Burp Suite Pro, Nmap, Nikto, and Postman.
- Conducted Docker environment pentesting and developed Python/Bash automation to streamline workflows.
Penetration Tester
Teamlease Regtech Pvt Ltd
- Conducted 20+ comprehensive security assessments, uncovering critical application and network vulnerabilities.
- Performed in-depth source code reviews using Snyk and SonarQube.
- Automated server and firewall hardening using Bash and PowerShell scripts.
Public Work & Contributions
A selection of my public open-source contributions. Custom client toolkits and sensitive engagement reports are kept strictly confidential.
Securescope
2024AI-Powered Security Analysis Portal: Automated SAST, SCA & SBOM generation for GitHub repositories using Claude AI integration.
View RepositoryLinshot
2024A native, lightweight, and lightning-fast Linux screenshot and annotation tool designed as a powerful alternative to Greenshot.
View RepositoryAutomation Scripts
OngoingCustom Bash and Python scripts to automate routine vulnerability scanning, server hardening, and complex testing workflows.
Hall of Fame
Australian Government Taxation Office (ATO)
Acknowledged for responsibly disclosing system security vulnerabilities.
Leiden University
Awarded an Appreciation Letter for discovering a Reflected Cross-Site Scripting (XSS) vulnerability on their custom login portal.
Ready to Secure Your Business?
Data breaches are expensive. Penetration testing is an investment. Let's discuss your security needs and how we can protect your infrastructure from modern threats.