Senior Penetration Tester & Adversarial Security Engineer

FSP is seeking a capable penetration tester in the United Kingdom to support high-impact security projects for diverse customers. You will assess security across web, network, and infrastructure layers, triage findings, and contribute to vulnerability research and tooling development.

The role requires at least 2 years in pentesting or vulnerability research, strong coding skills (C/C++, C#, Java, Python), and the ability to script and build custom tools.

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