Security Expert (m/w/d) Open Source - Focus on TYPO3 CMS

Your Responsibilities

• Analyze, assess, and remediate security vulnerabilities in the TYPO3 Core and in extensions
• Contribute to security audits and code reviews with a focus on secure software development
• Develop and implement security best practices for open source projects
• Support the coordination and publication of security advisories
• Collaborate with international developer communities
• Monitor security threats and derive appropriate countermeasures

Your profile

Your Profile

• Several years of experience in IT security, ideally in an open source environment
• Very good knowledge of PHP and experience with TYPO3 CMS (Core or extensions)
• Experience with common security standards (e.g., OWASP Top 10)
• Know-how in topics such as authentication, authorization, encryption, and web security
• Experience with code analysis tools and penetration testing is a plus
• Structured and self-directed way of working
• Good English skills (project communication at an international level) Nice to Have
• Experience contributing to open source projects
• Knowledge of CI/CD pipelines and automated security checks
• Understanding of hosting and infrastructure security

We offer

Why us?

What We Offer

• Collegial working environment, agile work culture and a first-name culture, flat hierarchies, and short decision-making processes
• Collaboration with a dedicated international community
• Free choice of your operating system
• We take a long-term approach and seek like-minded people in the open-source environment
• We strongly believe in open-source morality
• Appreciation of new ideas and the opportunity for personal development
• Space for personal and professional development
• Regular attendance at TYPO3 Camps, Developer Days, and external events is happily supported
• Remote-first culture with optional in-person meetups
• Flexible working hours (full-time or part-time possible)

Your mission