Network Security Engineer – Scale & Secure Global Network

Jane Street; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Jane Street is seeking an experienced Network Engineer to join our Network Security team. The role focuses on operating, scaling, and improving network security infrastructure through hands-on design and implementation across a multi-vendor environment.

You will collaborate with global colleagues to deploy secure, efficient network solutions, enhance observability, and drive automation while supporting traders and applications with robust security posture.

Qualifications

• Have 7+ years of experience operating and deploying network infrastructure.
• Experienced with routing and network protocols (OSPF, BGP, PIM-SM).
• Experienced with troubleshooting transport protocols (TCP/UDP).
• Strong understanding of firewall hardware architecture, performance metrics, and components.
• Experienced with firewall configuration and troubleshooting.
• Understand Public Key Infrastructure and related technologies.
• Understand modern encryption techniques.
• Have a high capacity to learn and adapt to new ideas.
• Able to context-switch and prioritize tasks in a busy environment.
• Ideally have overlay networks experience (EVPN, VXLAN).
• Team player with collaborative mindset and some programming proficiency.

Responsibilities

• Work with Network Engineering to design and deploy security perimeter and adjacent network infrastructure.
• Manage and evolve network segmentation, DMZ, and network security aspects.
• Evaluate and lab-test new platforms for network security infrastructure.
• Collaborate with Cybersecurity to detect and mitigate threats and vulnerabilities.
• Interface with application owners and traders to enable secure business workflows.
• Enhance observability and scripting to improve network infrastructure monitoring.
• Improve network security processes and documentation.

Skills

Networking fundamentals

Security awareness

Routing protocols (OSPF,BGP,PIM-SM)

TCP/UDP troubleshooting

Firewall architecture & metrics

Firewall configuration & debugging

Public Key Infrastructure (PKI)

Encryption techniques

Scripting/automation

Programming language proficiency

Team collaboration

Learning agility

Job description

Jane Street is seeking an experienced Network Engineer to join our Network Security team. The role focuses on operating, scaling, and improving network security infrastructure through hands-on design and implementation across a multi-vendor environment.

You will collaborate with global colleagues to deploy secure, efficient network solutions, enhance observability, and drive automation while supporting traders and applications with robust security posture.