Castillians is HIRING A

Senior Penetration Tester

📍 Europe 🌐 Fully RemoteFull Time
POSTED June 30, 2026

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Tech Stack:

This is a remote position.

The Castillian is engaged with a professional services and consulting firm client and is focused on the following tasks.

  • Conducting extensive penetration tests across networks, applications, cloud environments, and infrastructure.

  • Scanning the client's external exposure websites and domains to identify security vulnerabilities and performing vulnerability assessments, and providing risk-based remediation recommendations.

  • Lead Threat-Led Penetration Testing (TLPT) / TIBER engagements, working with financial institutions and regulatory bodies.

  • Utilizing Threat Intelligence methodologies to simulate realistic attack scenarios.

  • Producing detailed technical reports outlining findings, risk levels, and mitigation strategies.

  • Collaborating with security teams, SOC analysts, and blue teams to improve defensive strategies.

  • Staying updated on the latest attack techniques, tools, and industry best practices.

  • Developing and deploying custom tooling and malware for Red Team engagements to improve the client's security posture.

  • Guiding and mentoring junior team members on documentation, processes, and addressing technical queries.

Please mention you found this job on TestDev Jobs. It helps us get more people to hire on our site. Thanks and good luck!