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Houssem ZeiriHZ

Houssem Zeiri

Application Security Engineer

€700/day
Paris, FR
8-15 years

Average response time: 1 hour

About Houssem

Offensive Security Expert with 8+ years of experience in the cybersecurity field, specializing in penetration testing, red teaming, and vulnerability assessments. Active on platforms like Hack The Box and TryHackMe. Certified CEH, OSCP, OSWE, currently pursuing BSCP and CWEE to further deepen expertise in advanced offensive techniques and security engineering. Proven track record in identifying and exploiting security flaws in complex infrastructures.
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Basic

  • Arabic

    Fluent

Can work on-site
Paris (up to 50km)

Experience

  • Cegedim,
    APPLICATION SECURITY ENGINEER
    July 2024 - Today (1 year and 11 months)
    Paris, France
    • Security by Design support for projects
    • Awareness and training developers in web vulnerabilities
    • Mobile and Web Application penetration tests
    • Qualification, management and execution of web application Pentest campaigns
    Pentest Web DevSecOps Pentest Mobile Pentest API Code Review
  • JCDecaux,
    CYBERSECURITY ENGINEER
    September 2022 - July 2025 (2 years and 10 months)
    Paris, France
    • Internal and external pentesting of the entire perimeter
    • Active Directory configuration audit
    • Network equipment configuration audits (routers, firewalls)
    • Web and mobile applications penetration test (more than 100 mobile and web applications)
  • Proxiad,
    CYBERSECURITY CONSULTANT
    September 2019 - August 2022 (2 years and 11 months)
    Paris, France
    • Web security audits (black box, grey box and white box)
    • Writing of reports including the findings identified during the audit as well as the associated recommendations
    • Tracking and remediation of vulnerabilities reported by Checkmarx and SonarQube

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Education

  • OSWE, OSCP, CEH, Comptia Security+, BSCP
    OSWE, OSCP, CEH, Comptia Security+, BSCP
  • Master degree
    TELECOM PARIS TECH
    2019
    Master degree

Skill set

Categories