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Security Engineering Lead

https://www.citi.com/ Logo

Citi

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Location:
United Kingdom , London

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Category:
IT - Software Development

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Contract Type:
Employment contract

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Salary:

Not provided
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Job Description:

Citi's Application, Platform and Engineering team is looking for a Security Engineering Lead to engineer cutting-edge AI products at planetary scale, ensuring security is built into every aspect of development. The role involves leveraging modern technologies, conducting penetration testing, and mentoring secure coding practices.

Job Responsibility:

  • Build secure AI products
  • conduct penetration testing and vulnerability research
  • design automated security solutions
  • identify and mitigate AI-specific vulnerabilities
  • lead security practices in development lifecycles
  • mentor engineers on secure coding practices.

Requirements:

  • Bring your deep-dive application security engineering expertise from building production systems
  • thrive in a results-driven environment, where flexibility fuels impact
  • be a game-changer, ready to step beyond your designated role
  • love the synergy of pair programming
  • seize the opportunity to secure AI applications at scale
  • have a relentless passion to learn more about AI security, LLM attacks, and bringing your knowledge to shape Citi's secure AI future
  • proven track record of architecting and building secure, large-scale production applications and business-facing platforms from the ground up
  • hands-on experience finding and exploiting vulnerabilities, conducting red team exercises, and thinking like an attacker to strengthen defenses
  • experience building security tools and secure production systems with Go, Python, JavaScript
  • deep experience with HashiCorp Vault for enterprise-scale secrets management
  • designing and implementing OAuth, JWT, RBAC, and complex identity systems
  • securing REST/GraphQL APIs and conducting threat assessments in high-traffic production systems
  • understanding of LLM vulnerabilities, prompt injection attacks, and AI-specific threat vectors
  • automating manual security processes
  • securing containerized applications in Kubernetes and service mesh environments
  • experience investigating and responding to security incidents in live production systems.

Nice to have:

  • pair programming
  • knowledge of AI security and LLM attacks
  • experience with generative AI projects utilizing LLMs.
What we offer:
  • 27 days annual leave plus bank holidays
  • discretional annual performance-related bonus
  • private medical care and life insurance
  • employee assistance program
  • pension plan
  • paid parental leave
  • special discounts for employees, family, and friends

Additional Information:

Job Posted:
November 15, 2025

Employment Type:
Fulltime
Work Type:
On-site work
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