Contracting position: Security tester!

• Fulltime: 36hrs
• Contract: 2 januari 2026 – 31 december 2026
• Michael Bailey Payroll

As an experienced Security Tester / Penetration Tester, you play a key role in safeguarding digital services such as payments. You conduct security tests and code reviews on internally developed and externally delivered (web) applications. You identify vulnerabilities, report them to the responsible development teams, and advise them on effective remediation strategies.

Collaboration is essential. You will work within a cybersecurity team focused on a broad range of services, including vulnerability testing, vulnerability hunting, responsible disclosure processes, technical state monitoring, and vulnerability scanning.

Your Capabilities

• Secure code review in: .NET, Java, React, AngularJS
• Infrastructure security: Azure, AWS, Linux, Windows
• Network penetration testing
• Mobile application testing: iOS, Android
• Code-scanning and secure development support
• (Web) application penetration testing
• Experience with DAST/SAST tools
• Preferable certifications: OSCP or equivalent
• Languages: English (Dutch is a plus)
• Preferably experienced in Agile ways of working

Competencies

• Strong security mindset
• Creative and out-of-the-box thinker
• Analytical and detail-oriented
• Strong communication skills
• Collaborative attitude
• Organisational awareness
• Proactive and self-driven

Our Mission

You will join an organisation that strives to make a positive societal impact while ensuring the security of digital services. We support initiatives that contribute to a safer, more inclusive world from reducing waste to helping individuals gain financial stability, to supporting newcomers in finding meaningful employment.

Additional Information

A High-Risk Screening is part of the onboarding process.