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Cybersecurity Engineer

Jane Street
🇬🇧LondonMediorFull-timePosted April 21, 2026

About the Role

We're looking to add a full-time, passionate Cybersecurity Engineer to our London office to help protect our company's people, data, and infrastructure from the wilds of the internet. Our Cybersecurity Engineers work on firm-wide defenses, provide expertise and advice to other groups, lead employee cybersecurity awareness efforts, and handle some of the event analysis and incident response responsibilities of the firm. We're looking for someone who has a strong technical foundation, who is not afraid to build something themselves, who brings good taste to solving security problems, and who can reason about and explain the "why" behind security practices.

Requirements

  • Strong scripting or programming, and surrounding practices: interest and ability to automate in a real programming language, ability and desire to manage your code and configs in version control, and knowledge of your editor
  • A measured responder: can discuss trade-offs when it comes to cybersecurity, think about context, and understand what threat modeling is
  • Understands and practices good personal cybersecurity hygiene, and can talk to others about it (e.g. knows what a password manager is, uses one or has something reasonably better, and can walk someone through the tradeoffs made)
  • Tapped into cybersecurity developments: follows cybersecurity news, but can tell the difference between the latest cool hack by security researchers and what actually matters in day-to-day
  • A positive and collaborative attitude: understands that a key component of cybersecurity is bringing others along with you
  • Fluency in English