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IT Infrastructure Security Engineer

JanestreetLondon, United KingdomFull-timeSalary not listed · Typical pay in United KingdomPosted Nov 11, 2026

Janestreet has an opening for an IT Infrastructure Security Engineer in London, United Kingdom. The listing describes it as a full-time position.

Written by Dev Global Jobs

DGJ summary of this job

Our own short read of this listing, built only from the facts it gives. The employer’s original text follows further down.

Janestreet has an opening for an IT Infrastructure Security Engineer in London, United Kingdom. The listing describes it as a full-time position.

From the advert, the main requirements are English language skills.

The advert names auditing as a skill for this role.

The employer does not state a salary in this listing; DGJ Insight below shows an official pay benchmark for the place where one exists.

Visa sponsorship is not mentioned. Applicants from outside United Kingdom should check the official work permit route before applying.

Dev Global Jobs found this job on Arbeitnow on Nov 11, 2026.

Employer
Janestreet
Location
London, United Kingdom
Job type
Full-time
Pay
Not stated by the employer
Languages asked
English
Found
Nov 11, 2026 on Arbeitnow
Employer text
401 words, about 2 min to read
Skills named in the advert
auditing
Before you apply
  • Apply only on the official page (arbeitnow.co.uk). Dev Global Jobs is not the employer and never asks for a fee.
  • Mirror the skills the advert names (auditing) in your CV where you really have them; applicant tracking systems look for these words.
  • Say your level in English plainly (for example B2 or C1).
  • Read the employer’s full text below (about 2 min) before you apply.
  • Build or check your CV with the free DGJ CV Builder.
Only on Dev Global Jobs

DGJ Insight

Our own data about this role and place, from official statistics and our live job index.

Updated Nov 12, 2026
Pay benchmark
Average wage, United Kingdom
GBP 46,511 average / year

Source: OECD Average annual wages, 2025

Cost of living · United Kingdom
100.5 vs New York = 100

UN living-cost index for United Kingdom (ICSC post adjustment 76.4), as of 1 Oct 2026.

Source: ICSC post adjustment classifications (icsc.un.org)

Work permit route
  • Skilled Worker visa: Job offer from a licensed sponsor at the required skill and salary level; English requirement
  • Health and Care Worker visa: Eligible health and social care roles with a licensed sponsor
  • Global Talent visa: Endorsement as a leader or potential leader in a listed field

Official routes: UK Visas and Immigration (GOV.UK)

Job description

About the role

Full text from the employer, as published on Arbeitnow, arranged into sections. Nothing added or removed.

01About the Position

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 our global team secure Jane Street’s IT platforms. In this role, you’ll need strong judgement and discerning taste to prioritise potentially complex and extensive remediation efforts. You'll help decide where we focus our resources, providing technical advice and making decisions on behalf of the group where needed. We're looking for builders: people who spend their time writing code and automation (e.g. PowerShell modules, Python) and integrating security products via their APIs, rather than primarily configuring and operating the tools themselves.

In this role, you will proactively propose, design, test, implement and document strategic security controls. You will coordinate and deliver security solutions across our IT platforms while identifying opportunities to further automate intelligent workflows. You will 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. This role will encompass a range of responsibilities, including building security controls that scale, investigating emerging threats, developing new security tooling and driving vulnerability management initiatives.

This position sits within our IT Engineering group, a highly dedicated team of engineers who monitor and manage our environment across a physical/virtual computing landscape that spans three continents. Your analytical thinking and expertise will be invaluable as we support the daily work of our colleagues and keep our systems operating at the highest standard.

02About You

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

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