Penetration Tester (Cybersecurity)

TL;DR

Penetration Tester (Cybersecurity): Conducting offensive security assessments across web applications, networks, and cloud environments with an accent on simulating real-world attack scenarios and identifying complex vulnerabilities. Focus on delivering actionable technical insights, collaborating with development teams on remediation, and maintaining high standards of system resilience.

Location: Must be based in or able to commute to London, UK (Hybrid: 2 days/week in office)

Company

A global leader in AI-driven cybersecurity, specializing in adaptive AI solutions to detect and respond to real-time cyber threats.

What you will do

• Perform penetration tests on web applications, networks, APIs, mobile apps, and cloud environments.
• Simulate real-world attack scenarios to assess infrastructure resilience.
• Produce detailed technical reports and executive summaries for stakeholders.
• Collaborate with internal teams to validate findings and support remediation efforts.
• Stay up to date with emerging threats, vulnerabilities, and offensive security techniques.
• Mentor junior testers and contribute to internal tooling development.

Requirements

• Must be able to work from the London office 2 days per week.
• Solid background in penetration testing or offensive security.
• Proficiency with tools like Burp Suite, Nmap, Metasploit, Nessus, and Kali Linux.
• Scripting skills in Python, Bash, or PowerShell.
• Strong understanding of OWASP Top 10, MITRE ATT&CK, and CVSS scoring.
• Familiarity with cloud platforms (AWS, Azure, GCP) and container security.

Nice to have

• Relevant certifications such as OSCP, CREST CRT, or eCPPT.
• Experience in mentoring junior team members.

Culture & Benefits

• 23 days of holiday plus public holidays, increasing to 25 days after 2 years.
• Private medical insurance covering partner and children.
• Life insurance (4x base salary) and salary sacrifice pension scheme.
• Enhanced family leave and confidential Employee Assistance Program.
• Birthday day off and cycle to work scheme.