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⏰ Full-time

Senior Penetration Tester

Arcus Search
Location 📍 london, United-Kingdom
Posted 📅 June 05, 2026
Work Type ⏰ Full-time

Position Overview

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 understand their risk
  • Build scrappy (and ...

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Job Details

Employment Type
Full-time
📊
Category
Other-General
🏠
Work Arrangement
On-site
📍
Location
london, United-Kingdom