
Shahadat Fahim
Cyber Security Expert, Penetration Tester, Bug Bounty Hunter
Skills

Portfolio
Work experience
Freelance Penetration Tester & Bug Bounty Hunter
Self-Employed
Aug 2025 - Present • 10 mos
Conducted web application penetration tests for clients worldwide. Identified critical vulnerabilities including IDOR, JWT flaws, XSS, and API key exposure. Active bug bounty hunter on HackerOne, Intigriti, and YesWeHack.
Web Application Penetration Tester
Cyber Bangla • Full-time
Feb 2025 - Nov 2025 • 9 mos
Executed OWASP Top 10 security assessments, identified vulnerabilities, and validated client remediation efforts. Delivered CVSS-scored reports with actionable fixes.
Web Application Penetration Tester
WebBattalion • Part-time
Feb 2024 - Nov 2025 • 1 yr 9 mos
Conducted web and API penetration testing using bug bounty-style methodologies. Tested authentication flows, business logic, and API endpoints for security flaws.