Network Security Engineer

Benefits

Parental leave

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Non-birth-parent leave

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Family-building benefits

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• Adoption assistance: Not verified
• Surrogacy assistance: Not verified

Mental health support

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Relocation assistance

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Childcare support

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Learning budget

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Verification

Not verified checked Jun 7, 2026

Salary

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401(k) match

Reported from DOL Form 5500 industry filing (not employer-specific)

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Role

Role function

Security From the posting source checked Jun 20, 2026

Seniority

Mid From the posting source checked Jun 20, 2026

Schedule

Shift type

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Weekend work

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Application

Cover letter

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Assessment

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Deadline

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Where they hire

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About this role

Network Security Engineer London, England, United Kingdom About the Position We are looking for an experienced Network Engineer to join our Network Security team to help us to run, scale and continuously improve our network security infrastructure through hands-on operations, design, and implementation. The ideal candidate would have strong networking fundamentals and experience with security appliances such as firewalls and proxy to join our Network Security team. Jane Street's numerous distributed systems are built on an agile, reliable, multi-vendor network infrastructure that supports all traffic profiles, from trading to internet connectivity. Supporting such a large multi-function network requires advanced tooling for monitoring and automation. Strong communication and interpersonal skills will be needed to collaborate with colleagues across the firm globally. You will find and resolve issues, plan and execute deployments, and improve systems where possible. In this role, we'll look to leverage your advanced networking skills and security knowledge to: - Work closely with Network Engineering on design and deployment of security perimeter and adjacent network infrastructure - Effectively manage and continuously evolve network segmentation, DMZ, and other aspects of network security - Evaluate and lab test new platforms for our network security infrastructure - Collaborate with Cybersecurity on detection and mitigation of threats and vulnerabilities on our network - Interface with application owners and traders to enable business workflows in a secure way - Proactively enhance support by improving network infrastructure observability, scripting, and communicating requirements to our software engineers - Improve our network security processes and documentation A

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