CareerPlan

Senior Security Specialist - Penetration Testing

London, England, GBFull-time2026-10-25 → 2026-11-10

Core

Planning and executing penetration tests across applications, infrastructure, and cloud environments to uncover vulnerabilities and improve security posture.

Role type

Senior IC offensive security engineer (penetration testing)

Builds

Security assessments and remediation guidance for enterprise systems

Domain

Financial services / Cybersecurity

Required skills

Penetration testing (Web Apps, APIs, Infra, Cloud), Burp Suite, Cloud platforms (AWS, Azure, GCP), Containerization (Docker, Kubernetes), Custom scripting, Technical reporting, Enterprise environment experience

Preferred skills

Threat modelling, Security community engagement, R&D initiatives

Technologies

Burp Suite, AWS, Azure, GCP, Docker, Kubernetes, Command-line tools

Responsibilities

Conduct in-depth penetration tests on applications, infrastructure, and cloud environments; Take full ownership of assigned pentesting engagements end-to-end; Compile technical scoping documents and track assessment metadata; Document findings clearly and provide actionable remediation guidance; Collaborate with application teams to scope, execute, and report on security assessments; Develop and maintain custom tools, scripts, and exploits to support testing activities

Seniority

Senior, hands-on IC