Penetration Tester
G-Research · London
We tackle the most complex problems in quantitative finance, by bringing scientific clarity to financial complexity.
From our London HQ, we unite world-class researchers and engineers in an environment that values deep exploration and methodical execution - because the best ideas take time to evolve. Together we’re building a world-class platform to amplify our teams’ most powerful ideas.
Security is foundational to this mission and must be delivered in a way that supports how our engineering teams build and operate complex systems at scale.
Take the next step in your career.
The role
As a Penetration Tester, you will lead and conduct penetration tests and vulnerability assessments across a wide range of internal systems and security controls. Your work will directly strengthen our overall security posture through continuous testing, actionable insights and collaboration on remediation strategies.
Key responsibilities of the role include:
Performing in-depth penetration testing across a variety of technologies, including Kubernetes, Jenkins and Windows Domain Services
Delivering practical, impactful remediation advice to Control Owners based on identified vulnerabilities
Supporting business and application owners in assessing and improving the effectiveness of their security controls
Providing technical consulting and assurance to Risk, Compliance and Detection Engineering teams, including control assessments and configuration reviews
Maintaining and enhancing the team’s operational tooling, automation and system integrations
Mentoring and supporting less experienced team members, fostering knowledge sharing and growth
Who are we looking for?
The ideal candidate will have the following skills and experience:
Proven expertise across the full penetration testing lifecycle, from scoping and execution to reporting and stakeholder debriefs
Deep understanding of vulnerability assessment practices, including effective remediation strategies for both infrastructure and application-level security
Strong background in technical security roles across diverse environments; familiarity with DevOps technologies
Experience validating the effectiveness of security controls through both manual and automated approaches
Engineering experience, particularly in building automation and tooling to streamline team output
Proficiency in development and scripting tools commonly used in DevSecOps, including Python, Jenkins and Ansible.
Relevant security certifications with OSCP required and CRT or OSEP desirable
Strong communication and interpersonal skills, with an emphasis on clear and concise written output
Why join us?
Highly competitive compensation plus annual discretionary bonus
Lunch provided via Just Eat for Business and dedicated barista bar
35 days’ annual leave
9% company pension contributions
Informal dress code and excellent work-life balance
Comprehensive healthcare and life assurance
Cycle-to-work scheme
Monthly company events
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