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    Senior Security Engineer

    Technology
    83zero Ltd
    London, City
    Permanent
    Competitive
    Hybrid

    Job Description

    Salary: 80,000 - 90,000 per annum

    Location: London

    What the role covers:

    Designing, developing, optimizing, and enhancing a GenAI prompt security platform to protect firm AI/LLM-based applications from adversarial attacks and prompt injections.

    • Building and automating a security testing framework to validate protection mechanisms for various LLM use cases.

    • Owning solutions that are expected to operate and perform at scale across the organisation.

    • Collaboration with multiple stakeholders and partners across Engineering and Operations as well as partner teams within the wider Citi organisation, across different time zones.

    Job Skills/ Qualifications:

    Highly motivated self-starter with excellent interpersonal and problem-solving skills

    • Bachelor's degree or equivalent work experience

    • Good oral and written communication skills

    • 7+ years of relevant industry work experience

    • Experience of the full lifecycle of design, implementation and running of enterprise software solutions involving cross functional team collaboration

    • Expertise in a major programming language such as Python and/or Go, and associated tooling (Git, Maven, IDEs, Jenkins etc)

    • Expertise in designing and implementing secure APIs and libraries.

    • Experience in Generative AI, LLM frameworks, LLM prompt engineering and/or adversarial testing is a bonus.

    • Experience with Cyber engineering and Operations, which could include DevSecOps or MLSecOps.

    • Experience contributing to the architecture and design (architecture, design patterns, reliability, scaling) of new and current systems

    • Experience in containerized deployment (Kubernetes, OpenShift etc).

    Posted on August 12, 2026

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