Staff Product Security Engineer | London

London, UK | Full-Time | SC Clearance Required | UK Citizens Only

We are a defence technology company working on some of the most technically complex systems being built today - AI platforms, command and control systems, aerospace vehicles, and long range sensors. Keeping them secure isn't an afterthought here. It's a core part of how we build.

We're looking for a Staff Product Security Engineer who wants to get their hands dirty developing novel security tooling, hunting vulnerabilities, conducting adversarial testing, and working directly with engineering teams to build resilience into the products themselves.

What you'll be doing:

• Owning the development and maturation of security features across our product suite
• Conducting architecture reviews, source code analysis, configuration audits, and adversarial testing
• Building and integrating security tooling across the product portfolio
• Authoring System Security Plans, Threat Analysis and Risk Assessments, and compliance documentation
• Working alongside engineering, manufacturing, and operations teams to embed security into both products and processes
• Identifying and remediating weaknesses in designs, implementations, and integrations before they become problems