Penetration Tester

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.

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.

Who are we looking for?

• 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

G-Research is committed to cultivating and preserving an inclusive work environment. We are an ideas-driven business and we place great value on diversity of experience and opinions.

We want to ensure that applicants receive a recruitment experience that enables them to perform at their best. If you have a disability or special need that requires accommodation please let us know in the relevant section