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Principal Security Engineer, Application Security

GitLab is an open-core AI-powered DevSecOps platform used by thousands of organizations to accelerate software development. The Principal Application Security Engineer will lead complex security engineering initiatives, conduct vulnerability research and PoC exploitation, define secure development practices and Paved Roads, and partner with product and engineering teams to prevent and remediate security defects across the platform.

Skills

  • Effective use of GitLab and experience working in remote, asynchronous teams
  • 8+ years of professional experience in Application Security or Vulnerability Research
  • Expertise in detecting/remediating security defects, including race-condition and logic vulnerabilities
  • Programming experience (preferred: Ruby/RoR, Go, TypeScript) and familiarity with GraphQL APIs
  • Deep knowledge of OWASP Top 10, STRIDE, CVSS scoring, and Threat Modeling
  • Experience with code review, threat modeling, SAST, DAST, penetration testing, and bug bounty workflows
  • Strong understanding of CI/CD, supply chain, and API security risks
  • Proven ability to discover and identify fixes for SQLi, XSS, CSRF, SSRF, and auth/authorization flaws
  • Strong written and verbal English communication and ability to influence senior leadership

Responsibilities

  • Drive resolution of systemic vulnerability classes and platform-wide mitigations
  • Perform complex application security reviews, threat modeling, and attack surface analysis
  • Conduct vulnerability research and create controlled proof-of-concept exploits
  • Define and establish secure development practices, Paved Roads, and security standards
  • Provide technical leadership during security crises and major incident response
  • Contribute to long-term security architecture and strategic product design
  • Coach and mentor junior engineers and influence cross-functional teams

Education

  • Bachelor's degree in Computer Science or equivalent practical education (or equivalent experience)
  • Technical bootcamp or equivalent hands-on training accepted

Benefits

  • Benefits supporting health, finances, and well-being
  • All-remote, asynchronous work environment
  • Flexible paid time off
  • Team Member Resource Groups
  • Equity compensation and Employee Stock Purchase Plan
  • Growth and development budget
  • Parental leave
  • Home office support
  • Inclusive EEO policies and accommodation support
To read the complete job description, please click on the ‘Apply’ button

Average salary estimate

$220000 / YEARLY (est.)
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$180000K
$260000K

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CULTURE VALUES
Inclusive & Diverse
Rise from Within
Mission Driven
Diversity of Opinions
Work/Life Harmony
Customer-Centric
Social Impact Driven
Dare to be Different
BENEFITS & PERKS
Maternity Leave
Paternity Leave
401K Matching
Paid Holidays
Paid Time-Off
Medical Insurance
Dental Insurance
Vision Insurance
Mental Health Resources
Life insurance
Health Savings Account (HSA)
Flexible Spending Account (FSA)
FUNDING
SENIORITY LEVEL REQUIREMENT
TEAM SIZE
SALARY RANGE
$180,000/yr - $260,000/yr
EMPLOYMENT TYPE
Full-time, remote
DATE POSTED
October 8, 2025
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