AI Security Engineer & Pen Tester – London

Javelin Global Commodities; Greater London; On-site; GBP 80,000 - 120,000; Full time

Benefits offered by this job

Annual discretionary bonus

25 days holiday

Company pension (10% company contrib)

Private medical scheme

Travel insurance

Income protection

Life insurance (5x salary)

Bike2Work scheme

Season ticket loan

Onsite gym

Job summary

Javelin Global Commodities seeks a Penetration Tester & AI Security Engineer to join the London Infrastructure team. The role combines traditional penetration testing with AI security testing, secure AI development, and security assessments of client-facing solutions.

It is a full-time position based in our London office near Victoria. The candidate will identify vulnerabilities, demonstrate impact, and support remediation while ensuring AI systems adhere to security and data-access boundaries.

Qualifications

• Proven experience in penetration testing across infrastructure, web apps, APIs and cloud environments.
• Strong knowledge of Active Directory, Microsoft Entra ID, Microsoft 365, Azure and AWS.
• Understanding of AI security, including prompt-injection testing, AI red teaming, data leakage and access-control testing.

Responsibilities

• Conduct penetration testing across Javelin's infrastructure, applications, networks and cloud environments.
• Identify vulnerabilities and work with teams on remediation and retesting.
• Perform authorised security testing of new client-facing platforms before they go live and provide sign-off recommendations.
• Support secure in-house AI solutions including AI agents and automation.
• Develop and document secure AI development standards and produce actionable remediation guidance.

Skills

Penetration testing

AI security

Communication

Scripting

Security testing methodology

Tools

Burp Suite

Microsoft Copilot Studio

Azure AI

AWS

Job description

Javelin Global Commodities seeks a Penetration Tester & AI Security Engineer to join the London Infrastructure team. The role combines traditional penetration testing with AI security testing, secure AI development, and security assessments of client-facing solutions.

It is a full-time position based in our London office near Victoria. The candidate will identify vulnerabilities, demonstrate impact, and support remediation while ensuring AI systems adhere to security and data-access boundaries.