Finance | 25-8-2026

Senior AI Security Engineer

Salary: Up to £120,000 + Bonus & Excellent Benefits

The Opportunity

We are seeking a Senior AI Security Engineer to join a leading global investment bank, working on the development and security of the organisation's next-generation Generative AI and LLM-based applications.

This is a specialist engineering role focused on designing, developing and enhancing a GenAI prompt security platform, helping protect enterprise AI applications from prompt injection, adversarial attacks and emerging AI security threats.

You will work closely with Engineering, Cyber Security and Operations teams across the organisation to build secure, scalable solutions and automated security testing capabilities for a range of LLM use cases.

Key Responsibilities

• Design, develop, optimise and enhance a GenAI prompt security platform.
• Build and automate security testing frameworks to validate protection mechanisms across different LLM use cases.
• Develop security controls and solutions to protect against prompt injection and adversarial attacks.
• Design and implement secure APIs and reusable security libraries.
• Contribute to the architecture and design of enterprise AI security solutions.
• Ensure solutions are designed to operate reliably and securely at enterprise scale.
• Contribute to system architecture, design patterns, scalability and reliability.
• Work closely with Engineering, Cyber Security and Operations stakeholders across global teams.
• Support the development of AI security standards and best practices across the organisation.

Key Requirements

• 7+ years of relevant industry experience in software engineering or a related technical discipline.
• Strong programming experience with Python and/or Go.
• Strong experience designing and implementing secure APIs and enterprise software solutions.
• Background in Cyber Security Engineering, DevSecOps or MLSecOps.
• Experience with Generative AI, LLM frameworks, prompt engineering and/or adversarial testing.
• Experience contributing to enterprise architecture and system design.
• Strong understanding of security, reliability, scalability and enterprise software development.
• Experience working with containerised environments, such as Kubernetes or OpenShift.
• Experience delivering solutions across large and complex enterprise environments.
• Strong communication, stakeholder management and problem-solving skills.

What's on Offer

• Salary of up to £120,000 + Bonus + Excellent Benefits Package.
• Hybrid working in London.
• Opportunity to work on next-generation AI security technology within a global investment banking environment.
• Exposure to large-scale Generative AI, LLM and Cyber Security transformation.
• Opportunity to help shape AI security capabilities across a global organisation.

If you are an experienced AI Security Engineer, Cyber Security Engineer, Software Security Engineer or DevSecOps/MLSecOps professional with experience across Generative AI, LLM security or secure enterprise platforms, we'd be keen to hear from you.

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