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# Penetration Tester

- **Company:** Responsibilitiesperform
- **Location:** London, UK
- **Contract:** Permanent contract
- **Skills:** Software System Penetration Testing, Automation of Tests, DevOps, Intrusion Detection and Prevention, Python (Programming Language), Windows Domain, Scripting, Kubernetes, Devsecops, Jenkins, Vulnerability Analysis
- **Published:** August 20, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/penetration-tester/42151673

## About the Role

including Kubernetes, Jenkins and Windows Domain Services.Deliver practical, impactful remediation advice to Control Owners based on identified vulnerabilities.Support business and application owners in assessing and improving the effectiveness of their security controls.Provide technical consulting and assurance to Risk, Compliance and Detection Engineering teams, including control assessments and configuration reviews.Maintain and enhance the team's operational tooling, automation and system integrations.Mentor and support less experienced team members, fostering knowledge sharing and growth.QualificationsProven 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 mandatory and CRT or OSEP desirable.Strong communication and interpersonal skills, with an emphasis on clear and concise written output.BenefitsHighly competitive compensation plus annual discretionary bonus.Lunch provided via Just Eat for Business and dedicated barista bar.35 days annual leave and 9% company pension contributions.Informal dress code and excellent work-life balance.Comprehensive healthcare and life assurance.Cycle-to-work scheme.Monthly company events.We are committed to cultivating and preserving an inclusive work environment. We value diversity of experience and opinions, and we want to ensure 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.G-Research is passionate about the intersection of finance, technology, and the future. We offer a dynamic, flexible and highly stimulating culture where worlds-beating ideas are cultivated and rewarded, and we are proud to employ the best in their field and nurture talent in our collaborative working environment. #J-18808-Ljbffr

## Description

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.RoleAs 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.ResponsibilitiesPerform in-depth penetration testing across a variety of technologies


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