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Fatih Sencer
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Freelancer Information
I am a cybersecurity professional with over 5 years of hands-on experience in offensive security. I specialize in identifying real-world vulnerabilities in complex systems, combining technical expertise with a strong understanding of attacker methodologies. With a background in web, mobile, API, and AD network security, I deliver high-quality assessments backed by in-depth manual testing and secure coding knowledge. I hold several advanced certifications including OSCP, OSWE, and WPTXv2.
Skills & Services Offered:
✅ Web application penetration testing
✅ API security testing
✅ Mobile application security testing (Android)
✅ Active Directory and internal network assessments
✅ Manual code review for vulnerability discovery
✅ Secure architecture and logic flaw analysis
Programming Languages:
🟢 PHP
🟢 Go
🟢 Python
🟢 JavaScript
Freelancer Education
Work & Experience
As a Red Team Member at Synack, I actively participate in bug bounty programs to identify and exploit vulnerabilities in various systems. My key responsibilities include: - Performing advanced penetration testing - Collaborating with other security researchers - Reporting and documenting discovered vulnerabilities - Enhancing security measures through continuous testing and feedback
As a Senior Security Consultant at Deloitte, I specialize in delivering comprehensive offensive security to identify and mitigate potential security threats. My responsibilities include: - Leading and managing Red Team operations - Training and mentoring team members - Conducting web, mobile, and API penetration testing - Managing vulnerability assessments - Overseeing customer relationships and ensuring client satisfaction - Developing tools based on project needs - Managing Cyber Threat Intelligence (CTI)
I was a Red Team Security Engineer at Gais Cyber Security, where I conducted a wide range of penetration testing activities. My primary duties included - Conducting extensive web application testing - Evaluating the security of mobile applications - Assessment of API application vulnerabilities - Performing comprehensive internal network tests - Managing and mitigating customer-reported vulnerabilities - Lead and develop security projects to improve overall system security Conducting physical security tests to identify and exploit vulnerabilities in hardware and physical access controls
As a Cyber Security Assistant Specialist on the Red Team at Turk Telekom, I was responsible for a variety of security assessments and vulnerability management tasks. My key responsibilities included: - Managing internal vulnerability assessments - Handling customer vulnerability management - Performing internal network penetration tests - Conducting web application penetration tests - Testing mobile applications for security vulnerabilities - Conducting API penetration tests
Awards
Services
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TypeFreelancer
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English LevelFluent
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SkillsAndroid Pentesting, API Pentesting, Application and Data Security Testing, Client-side Security Testing, Code Assisted Pentesting, Code Review, Core Pentesting Skills, Go, Mobile Application Pentesting, Network Pentesting, Offensive Pentesting, OWASP Top 10 Web Application Pentesting, PHP, Session Management Testing, Single Page Application (SPA) Testing, Social Engineering, WAF Evasion, Web Application Architecture Analysis, Web Application Pentesting, Web Application Security Testing