We are looking for an Infrastructure Security Engineer with a strong Windows 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.
About 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
If you're a recruiting agency and want to partner with us, please reach out to [email protected].
Skills Required
- Proficient in securing Windows OS platforms and resolving complex technical issues
- Hands-on experience with application control, host-based firewalls, auditing/event monitoring and disk encryption
- Experience administering endpoint security and vulnerability management solutions (antivirus, anti-malware, EDR, vulnerability scanning, patch management)
- Knowledge of OS hardening, privileged access management and vulnerability mitigation
- Understanding of common threat tactics, techniques and procedures (TTPs) and countermeasures
- Well-versed in Windows core infrastructure services (Active Directory / EntraID, PKI)
- Proven experience automating workflows in PowerShell or other scripting languages (e.g., Python)
- Experience integrating security tooling via APIs and building automation/PowerShell modules
- Able to design, test, implement and document strategic security controls and automation
- Fluent in English
Jane Street Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Jane Street and has not been reviewed or approved by Jane Street.
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Healthcare Strength — Medical, dental, and vision coverage are offered at no cost for employees and dependents, with robust onsite care including primary care, physical therapy, and mental‑health therapy. Private onsite gyms and counseling resources further reinforce the health focus.
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Parental & Family Support — Fully paid parental leave for all parents, with additional time for birth parents, is highlighted alongside expanded fertility benefits and well‑equipped nursing suites. These offerings position family support as a core element of the package.
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Wellbeing & Lifestyle Benefits — Daily free meals and snacks, private onsite gyms, recreation spaces, and rich learning programs (including tuition reimbursement and company classes) elevate day‑to‑day quality of life. Onsite medical suites and speaker series add to the lifestyle and development mix.
Jane Street Insights
What We Do
Jane Street works differently. As a liquidity provider and market maker, we trade on more than 200 trading venues across 45 countries and help form the backbone of global markets. Our approach is rooted in technology and rigorous quantitative analysis, but our success is driven by our people. Our bright, beautiful offices in the heart of New York, London, Hong Kong, and Amsterdam are open and buzzing with conversation. We come from many backgrounds and encourage travel between offices to share perspectives. Some of our best ideas come from bumping into a visiting colleague at the office coffee bar. Markets move fast. Staying competitive as we’ve grown has required constant invention—of new trading strategies, technology, and processes. We’ve found this is easier when you hire humble, kind people. They tend to help each other, and prioritize teamwork over titles. We invest heavily in teaching and training. There’s a library and a classroom in every office, because deepening your understanding of something is considered real work. Guest lectures, classes, and conferences round out the intellectual exchanges that happen every day. People grow into long careers at Jane Street because there are always new and interesting problems to solve, systems to build, and theories to test. More than twenty years after our founding, it still feels like we’re just getting started.
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