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Jane Street

Trades stocks, bonds and funds as a market maker

IT Security Operations Engineer

Security Engineering & Architecture +1Updated on Nov 12
Full-timeLondon, UKNo salary listedIn-person

About the Job

Requirements

  • Have at least 5 years of experience as a security or operations engineer, with a technical background rooted in Windows.
  • Have experience maintaining, supporting, and administering Windows platforms at scale, including Active Directory and Group Policy.
  • Understand common attack scenarios targeting the Windows platform and the protection technologies designed to mitigate them.
  • Be comfortable troubleshooting and triaging security incidents and production issues, analyzing trends and logs, and using system monitoring and alerting tools to identify production disruptions.
  • Have hands-on experience deploying and implementing endpoint security controls at scale, including anti-malware, endpoint detection and response, application control, log aggregation, host-based firewalls, and disk encryption.
  • Be comfortable using PowerShell, including scripting or building tooling to automate security tasks.
  • Communicate clearly in writing and verbally, explaining processes to colleagues across the firm.
  • Be fluent in English.

Responsibilities

  • Deploy, document, and support security controls at scale.
  • Contribute to vulnerability management by ensuring vulnerabilities are rigorously detected and mitigated.
  • Provide security guidance and support to the broader IT department and IT Operations Team as security incidents arise.
  • Develop technical and non-technical solutions with engineering teams to address security concerns.
  • Contribute to the development of operational playbooks, procedures, guidelines, and technical security standards.
  • Liaise between the IT Security team and other internal technology groups to distill and communicate pertinent information.
  • Triage complex problems and delegate or escalate tasks effectively.

Desired Qualifications

  • Have experience working in a code-driven environment and hands-on experience with security incident response.
  • Have knowledge of macOS and mobile device security fundamentals.

About the Company

Jane Street

Trades stocks, bonds and funds as a market maker

Jane Street trades stocks, bonds, options, and exchange-traded funds with its own money as a market maker, a firm that constantly quotes prices to buy and sell so other investors can trade whenever they want. In 2025, it made more money from trading than JPMorgan Chase or Goldman Sachs, the biggest trading banks on Wall Street. Its traders, researchers, and engineers build computer-driven strategies that trade on exchanges and other venues around the world, and it also trades directly with large institutional clients. It earns the small gap between buying and selling prices across huge volumes, plus gains on positions it holds for minutes to days. Jane Street was founded in 2000 and is based in New York.

Company size
1,001-5,000
Company stage
Debt Financing
Total funding
$90.8B
Headquarters
New York City, New York
Founded
2000

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