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Infrastructure Security Engineer

Jane Street· Technology
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LondonFull-timePosted 3mo ago

About the role

We are looking for an Infrastructure Security Engineer with a strong cross platform engineering background and practical exposure to modern platform security controls to help secure Jane Street’s IT platforms. The role focuses on building security controls, automating workflows, and coordinating security solutions across IT platforms, with a mix of hands-on work, consultancy, and security influence.

Responsibilities

  • Proactively propose, design, test, implement and document strategic security controls.
  • Coordinate and deliver security solutions across IT platforms while identifying opportunities to further automate intelligent workflows.
  • Help secure internal IT and remote working platforms through a combination of hands-on technical work, consultancy and security influence to the wider IT team.
  • Build security controls that scale, investigate emerging threats, develop new security tooling and drive vulnerability management initiatives.
  • Work within the IT Engineering group to monitor and manage the environment across a global, multi-continent footprint.

Qualifications

  • Proficient in securing Windows OS platforms and resolving complex technical issues in a fast-moving environment
  • Hands-on experience utilising integrated security technologies for safeguarding Windows operating systems (application control, host-based firewalls, auditing and event monitoring, disk encryption)
  • Experienced in administering endpoint security and vulnerability management solutions (antivirus, anti-malware, EDR, vulnerability scanning, patch management)
  • Knowledge of security best practices (OS hardening, privileged access management, vulnerability mitigation)
  • Understanding of common threat TTPs and effective countermeasures
  • Well-versed in Windows core infrastructure services (AD/EntraID, PKI)
  • Eagerness to produce scalable and repeatable security practices through automation
  • Understanding of security tooling and APIs
  • Flexible, reliable and highly collaborative
  • Proven experience automating workflows in PowerShell or other scripting languages
  • Fluent in English

Skills

Required:Windows OS securitySecurity technologies for WindowsEndpoint security and vulnerability managementSecurity best practicesThreat understandingWindows core infrastructureAutomationScriptingSecurity tooling and APIsCommunication in English
Last updated Oct 25, 2026. Interested? Apply on the company site.

About Jane Street

SIX

Jane Street is a quantitative trading firm and liquidity provider with a unique focus on technology and collaborative problem solving.

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