Senior Penetration Tester 6 month Contract Inside IR35
Penetration tester responsible for leading AI-enabled vulnerability research and bug-hunting across priority applications, with initial focus on internet-facing assets.
The role combines deep manual offensive testing with frontier-model-assisted discovery, exploit validation (including chaining), risk-based triage, and remediation enablement.
Focus is on identifying real exploitable risk quickly, preventing triage backlog growth, and improving security engineering outcomes through repeatable testing standards and guardrails.
Project Context
Critical programme addressing AI-related security threats
Building a new specialist squad within Cyber Security
Work will be iterative and agile, focused on identifying and remediating vulnerabilities
Role Purpose
Combine traditional penetration testing with AI capabilities
Focus on: AI-enabled vulnerability research
Bug hunting using LLMs (Large Language Models)
Perform end-to-end testing, including: Source code review using AI
Analysing AI outputs
Manually validating vulnerabilities
Key Requirements
- Strong manual penetration testing experience
- Experience with: Vulnerability research
- Pen testing tools, methodologies, and processes
- Hands-on experience using AI/LLMs
- Experimenting with AI for security testing
- Using LLMs for automation or research
- Validate AI-generated findings manually
- Translate findings into actionable insights
Nice-to-Have
- Experience building or automating AI-driven testing workflows
- Bug bounty / research background
- Advanced experimentation with LLMs in security contexts
Candidate Profile
Senior, proactive, and research-driven
At the cutting edge of AI in security
Lead assigned workstreams
Provide feedback to engineering teams
Strong communication skills (critical for cross-team collaboration)