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Senior Penetration Tester

London, UK💼 Full-time🗓 2026-05-14 → 2026-08-07

Core

Senior Offensive Security Engineer conducting hands-on penetration testing, vulnerability analysis, and security program evolution to protect systems and applications.

Role type

Senior IC offensive security engineer (penetration testing)

Builds

Production security posture, automated security tools, and resilient systems

Domain

Cybersecurity / Offensive Security / Cloud Infrastructure

Deliverable

production ML models | product features | dashboards & analysis | research | client delivery | infrastructure | physical/clinical work

Required skills

Penetration testing, vulnerability assessment, root cause analysis, Python scripting, Java code review, Node.js code review, AWS architecture understanding, API security testing, third-party integration risk analysis, security program strategy

Preferred skills

OSCP certification, OSWE certification, CREST certification, GIAC certification, AWS certification, CTF participation, bug bounty hunting experience, security community involvement

Technologies

Python, Java, Node.js, AWS, APIs

Responsibilities

Conduct white-box and black-box penetration tests across applications, infrastructure, and APIs; triage and analyze bug bounty reports; build automation tools for reconnaissance and security insights; partner with engineering and SOC teams to remediate vulnerabilities; lead security workshops and knowledge sharing sessions; define security priorities and evolve the security program

Seniority

Senior, hands-on IC

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