Senior Penetration Tester

Posted 14 October 2025
LocationNetherlands
Job type Permanent
Discipline Technology

Job description

About the Company

Do you want to work on innovative security projects?

This isn't your typical pentesting role. Join a specialist cybersecurity consultancy that has spent over a decade securing the digital foundations of some of the world’s most recognised brands from agile, fast-scaling tech innovators to Fortune 500 giants.

This is a team of seasoned ethical hackers, researchers, and engineers who live and breathe offensive security. Their mission is simple yet vital: to make technology safer for everyone, without compromise.

If you thrive on curiosity, creativity, and challenge and you want to work somewhere that values technical depth over corporate process this could be the environment for you.

About the Role

You’ll join an elite, senior-heavy offensive security team that delivers high-quality, in-depth security assessments across a broad range of domains.

This isn’t a box-ticking pen test role, it’s about pushing boundaries, finding the unknowns, and constantly evolving your craft. You’ll be given autonomy, trust, and the freedom to innovate, alongside peers who share your hacker mindset.

Key Responsibilities

  • Conduct advanced penetration testing across web, mobile, network, and cloud environments

  • Deliver clear, concise, and actionable reports that demonstrate both technical depth and business relevance

  • Review and provide constructive feedback on peer assessments and documentation

  • Collaborate with clients to present findings, guide remediation, and enhance their overall security posture

  • Support the sales and delivery teams by performing technical scoping and intake sessions

  • Develop and refine internal tools, scripts, and methodologies to enhance testing capability

  • Actively contribute to internal research and innovation projects

  • Drive continuous improvement within both your own skillset and the wider team’s service offering

What We’re Looking For

Must Have:

  • Source code experience

  • Proven experience in penetration testing or red teaming (minimum 3–5 years)

  • Strong understanding of offensive security concepts and methodologies

  • Excellent written and spoken communication skills in English

  • Team-oriented mindset and a genuine passion for sharing knowledge

Nice to Have:

  • Experience in adversary simulation, malware development, or custom exploit creation

  • Familiarity with cloud security (AWS, Azure, GCP) or Active Directory environments

  • Additional advanced certifications (OSEP, OSED, CRTE, etc.)

What’s on Offer

  • A flat, non-bureaucratic culture where initiative and innovation are encouraged

  • Opportunities to research, publish, and develop new offensive techniques

  • A long-term environment that invests in your professional growth

  • Flexible hybrid/remote working model to suit your lifestyle

  • Competitive package including pension, premium equipment (MacBook), regular team events, and a genuinely collaborative culture

Why Join

You won’t just be performing assessments you’ll be part of a team that shapes offensive security standards, challenges conventional thinking, and builds long-term trust with clients who care about doing security properly.

If you see hacking as both a craft and a calling this is where you’ll feel at home.

Interested?

Apply directly or reach out confidentially to discuss how your background could align with this opportunites.