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Senior Penetration Tester

Arcus Search

london, london, United-Kingdom Full-time June 08, 2026
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Opportunity Description

Senior Penetration Tester


What You’ll Do

You’ll be on the front lines of our security efforts, thinking like an attacker to help us stay one step ahead. As a Senior Offensive Security Engineer, you’ll break things (responsibly), uncover weaknesses, and help us build stronger, more resilient systems.


This is a hands-on role where you’ll move fast, experiment, and have real impact. You’ll work closely with engineers, product teams, and security to turn findings into fixes — not just reports.


Day to day, you’ll:

  • Hack our own systems to find and fix vulnerabilities before others do
  • Run white-box and black-box pentests across apps, infrastructure, and APIs
  • Triage bug bounty reports and dig into external findings
  • Go beyond surface issues with root cause and variant analysis
  • Tear apart third-party tools and integrations to unders...
Full-time Financial Services,Technology, Information and Media

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