Senior Penetration Tester - Ethical Hacker

Are you passionate about cyber security challenges associated with threats and vulnerabilities, in the IT industry? Are you passionate to continuously learn and develop yourself and others? Are you interested in a role that offers the opportunity to support and work with large international clients and conduct penetration testing in highly sensitive and complex environments? If yes, then Deloitte’s Cyber team could be the place for you! We are looking for an experienced penetration tester, who is open to learn and develop new methodologies and techniques, mentor others and build teams. You will be part of a large team of penetration testers who will support you in your learning and knowledge building.

About you:

• 5+ years of experience in Penetration Testing, Offensive Security, Red Teaming, or a similar role
• Solid coding skills in scripting languages (e.g., Python)
• Solid knowledge web/mobile/binary applications security, and common attack vectors
• Solid knowledge in internal/external infrastructure testing
• Hands-on experience with Cloud & Kubernetes penetration testing
• Familiarity with MITRE ATT&CK and modern adversary techniques
• Strong communication skills—you can explain technical findings to both engineers and business stakeholders.
• Ability to lead and mentor a team of penetration testers on complex projects.
• EU work permit

Nice to have

• Vulnerability research or exploit development
• Purple Team/Red Team engagements
• AI-assisted development tools (GitHub Copilot, Claude Code, OpenCode, PI etc.)
• AI/LLM security testing
• German language

• Lead end-to-end penetration testing engagements across web applications, APIs, cloud environments, kubernets, binary applications and internal/external infrastructure.
• Simulate real-world attacks to identify security risks before they become threats.
• Mentor junior penetration testers and help grow a high-performing offensive security team.
• Develop custom tools, scripts, and automation to make penetration testing smarter and more scalable.
• Design and improve penetration testing processes, workflows, and internal platforms.
• Deliver clear, actionable reports that help technical and business stakeholders understand and mitigate risk.
• tay ahead of the latest vulnerabilities, attack techniques, and emerging security trends.

•Opportunities for professional growth, including mentoring, conferences, training, and certification.

•A supportive, collaborative, and motivational work environment.

•Involvement in the development of innovative applications.

•A wide range of benefits and the stability of working with a reputable company.

•Be part of a large penetration testing team with like-minded deeply technical people