Permanent
Senior Security Engineer
83zero Ltd
City of London
Posted: 21 July 2026 (Today)
Closing date: 20 August 2026
Ref: 225394777
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).
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