Automation-Focused Infrastructure Security Engineer

Jane Street; Greater London; On-site; GBP 100,000 - 140,000; Full time

Job summary

Jane Street is seeking an Infrastructure Security Engineer to design and implement cross‑platform security controls across global IT platforms. You will automate security workflows with PowerShell and Python, integrate security products via APIs, and guide remediation efforts with strong engineering judgment.

Expect to build scalable security practices, investigate threats, and advance vulnerability management across three continents as part of a dedicated IT Engineering team.

Qualifications

• Proficient in securing Windows OS platforms.
• Hands-on experience with integrated security technologies for Windows, including app control, host-based firewalls, auditing, and disk encryption.
• Experience administering endpoint security and vulnerability management solutions (antivirus, anti-malware, EDR, vulnerability scanning, patching).
• Knowledge of security best practices (OS hardening, PAM, vulnerability mitigation).
• Understanding of common threat techniques (TTPs) and countermeasures.
• Familiarity with Windows core infra (AD/EntraID, PKI).
• Desire to automate security practices through scripting and tooling.
• Experience with security tooling and APIs.

Responsibilities

• Design, implement and document strategic security controls across IT platforms.
• Coordinate and deliver security solutions while automating workflows.
• Secure internal IT and remote platforms through hands-on work and security influence.
• Build scalable security controls, investigate threats and drive vulnerability programs.
• Develop security tooling and integrate security products via APIs.

Skills

Windows security

Automation

PowerShell scripting

Python scripting

Security tooling & APIs

Vulnerability management

EDR

Threat Intel / TTPs

AD/EntraID / PKI

Automation of workflows

Tools

PowerShell

Python

Job description

Jane Street is seeking an Infrastructure Security Engineer to design and implement cross‑platform security controls across global IT platforms. You will automate security workflows with PowerShell and Python, integrate security products via APIs, and guide remediation efforts with strong engineering judgment.

Expect to build scalable security practices, investigate threats, and advance vulnerability management across three continents as part of a dedicated IT Engineering team.