Hazem Elsayed
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Hazem Elsayed Email & Phone Number

Lead Penetration Tester at HackerOne
Location: Istanbul, Türkiye, Turkey 8 work roles 1 school
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✓ Verified May 2026 3 data sources Profile completeness 100%

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Current company
HackerOne
Role
Lead Penetration Tester
Location
Istanbul, Türkiye, Turkey
Company size
6027 employees

Who is Hazem Elsayed? Overview

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Quick answer

Hazem Elsayed is listed as Lead Penetration Tester at HackerOne, a company with 6027 employees, based in Istanbul, Türkiye, Turkey. AeroLeads shows a matched LinkedIn profile for Hazem Elsayed.

Hazem Elsayed previously worked as Lead Offensive Security Engineer at Cyrex and Offensive Security Engineer at Cyrex. Hazem Elsayed holds Bachelor'S Degree, Computer Engineering from Beykoz Üniversitesi.

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HackerOne

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Profile bio

About Hazem Elsayed

I am an experienced Penetration Tester who specializes in identifying server and web front-end vulnerabilities, conducting security assessments, and performing audits. Leveraging my expertise in Android , IOS and game Penetration Testing, I have provided comprehensive security assessments and consulting services to a diverse range of organizations.With a track record of conducting proactive security testing for reputable bug bounty platforms such as HackerOne, Synack, and Zerocopter, I have earned a reputation for providing practical recommendations and conducting thorough security audits.In my current capacity as a full-time Penetration Tester at Cyrex, I utilize my skills and knowledge to bolster the security of their clients' networks and applications. My passion for ethical hacking and programming drives me to continually refine my expertise, ensuring that I stay up-to-date with the latest security trends and emerging threats.

Listed skills include Python, Css, Network Security, Linux, and 5 others.

Current workplace

Hazem Elsayed's current company

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HackerOne
Hackerone
Lead Penetration Tester
Istanbul, Turkey
Website
hackerone.com
Employees
6027
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Company profile
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8 roles

Hazem Elsayed work experience

A career timeline built from the work history available for this profile.

Lead Penetration Tester

Hackerone

Istanbul, Turkey

Lead Offensive Security Engineer

Current
Cyrex
Jan 2024 - Present

Offensive Security Engineer

Cyrex

Dublin, County Dublin, Ireland

As an Offensive Security Engineer at Cyrex, my role involves manually testing and scrutinizing networks, web-based applications, Android apps, games, and computer systems to identify vulnerabilities. I employ a thorough methodology that enables me to identify potential threats to the confidentiality, integrity, and availability of the targeted.

May 2022 - Jan 2024

Penetration Tester

Current
Hackerone

As a seasoned penetration tester on HackerOne, I specialize in identifying and mitigating security vulnerabilities for a diverse range of clients. My expertise spans across web applications, mobile applications, and game technologies, ensuring robust protection against potential threats.

Apr 2024 - Present

Bug Bounty Hunter

Current
Hackerone
  • Actively participating in both public and private bug bounty programs through responsible disclosure of security vulnerabilities in various web, mobile, and game technologies and applications for high-profile.
  • Over 500 security vulnerabilities responsibly disclosed and fixed.
  • Over 60 acknowledgments received from organizations such as PayPal, CompTIA, Rockstar, Spotify, Snapchat, Yahoo, BlackRock, HackerOne, and the NBA, etc.
  • … Show more Actively participating in both public and private bug bounty programs through responsible disclosure of security vulnerabilities in various web, mobile, and game technologies and applications for.
  • Ranked 298th on the all-time leaderboard (as of June 2024). Show less
Jun 2021 - Present

Bug Bounty Hunter

Current
Synack Red Team

In Sep, 2021 I was accepted as a member of the Synack Red Team, an invitation-only bug bounty platform with a 10% acceptance rate.

Sep 2021 - Present

Penetration Tester

Nakitcoins

Istanbul, Turkey

During my tenure as an Information Technology and Cyber Security Consultant at NakitCoins, I leveraged my technology expertise to safeguard the organization's sensitive data from internal and external threats, including cybercrime and unauthorized use.My primary responsibilities included ensuring the organization's IT infrastructure was secure and.

Jun 2021 - May 2022

Bug Bounty Hunter

Zerocopter

Working as a security researcher, testing third-party web applications for security vulnerabilities and disclosing them responsibly to their respective security teamshttps://app.zerocopter.com/user/h102x

Sep 2017 - Mar 2020
Team & coworkers

Colleagues at HackerOne

Other employees you can reach at hackerone.com. View company contacts for 6027 employees →

BA Baba Abubakar Baba Abubakar Colleague at HackeroneZaria, Kaduna State, Nigeria, Nigeria View → VR Vraj Raiyani Vraj Raiyani Colleague at HackeroneAhmedabad, Gujarat, India, India View → MA Mohammad-Nouri Al-Mohammad Mohammad-Nouri Al-Mohammad Colleague at HackeroneErbil Governorate, Iraq, Iraq View → SS Shiviam Singla Shiviam Singla Colleague at HackeroneMansa, Punjab, India, India View → SB Santiago Baena Santiago Baena Colleague at HackeroneMedellín, Antioquia, Colombia, Colombia View → AB Aryan Bhujbal Aryan Bhujbal Colleague at HackeronePune, Maharashtra, India, India View → EG Elias German Omar Elias German Omar Colleague at HackeroneBuenos Aires, Buenos Aires Province, Argentina, Argentina View → RV Rudney Vinicius Gonçalves De Souza Rudney Vinicius Gonçalves De Souza Colleague at HackeroneBauru, São Paulo, Brazil, Brazil View → AM Anoop M G Anoop M G Colleague at HackeroneOttappalam, Kerala, India, India View → SO Samwel Okoth Samwel Okoth Colleague at HackeroneMombasa County, Kenya, Kenya View →
1 education record

Hazem Elsayed education

FAQ

Frequently asked questions about Hazem Elsayed

Quick answers generated from the profile data available on this page.

What company does Hazem Elsayed work for?

Hazem Elsayed works for HackerOne.

What is Hazem Elsayed's role at HackerOne?

Hazem Elsayed is listed as Lead Penetration Tester at HackerOne.

Where is Hazem Elsayed based?

Hazem Elsayed is based in Istanbul, Türkiye, Turkey while working with HackerOne.

What companies has Hazem Elsayed worked for?

Hazem Elsayed has worked for Hackerone, Cyrex, Synack Red Team, Nakitcoins, and Zerocopter.

Who are Hazem Elsayed's colleagues at HackerOne?

Hazem Elsayed's colleagues at HackerOne include Baba Abubakar, Vraj Raiyani, Mohammad-Nouri Al-Mohammad, Shiviam Singla, and Santiago Baena.

How can I contact Hazem Elsayed?

You can use AeroLeads to view verified contact signals for Hazem Elsayed at HackerOne, including work email, phone, and LinkedIn data when available.

What schools did Hazem Elsayed attend?

Hazem Elsayed holds Bachelor'S Degree, Computer Engineering from Beykoz Üniversitesi.

What skills is Hazem Elsayed known for?

Hazem Elsayed is listed with skills including Python, Css, Network Security, Linux, Javascript, Cybersecurity, Web Application Penetration Testing, and Bash.

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