Principal Network Engineer; HFT Trading Networks

Job Title: Principal Network Engineer (HFT Trading Networks)

Location: Chicago, IL or New York City, NY

Work Model: Onsite 4 days per week

Duration: Full-time

Weare seeking a Principal Network Engineer to serve as the technical authority for our global, low-latency trading infrastructure. This role isideal for a seasoned network engineering leader with deep expertise in designing, scaling, and optimizing highly distributed, latency-sensitive environments across data centers, colocation facilities, and cloud platforms.

The Principal Network Engineer will be responsible for defining the long-term architecture and evolution of mission-critical trading networks, ensuring deterministic packet forwarding, exceptional reliability, and ultra-low-latency performance. This individual will operate as a hands-on technical leader,partnering with Network Engineering leadership, Infrastructure teams, and business stakeholders to drive strategic initiatives, influence architectural decisions, and establish engineering best practices.

Direct High-Frequency Trading (HFT) industry experience is required.

Theideal candidate possesses expert-level routing and switching knowledge, strong

Python automation capabilities, experience with hybrid cloud networking, and aproven track record supporting electronic trading environments where microseconds matter. Candidates with a CCIE certification or equivalent expertise are strongly preferred.

• Design,engineer, and evolve highly resilient, low-latency network architectures supporting global trading operations.
• Develop deterministic, scalable network solutions across data centers, co-location facilities, exchange connectivity environments, and cloud platforms.
• Drive architectural standards and long-term strategy for network scalability,resiliency, and operational excellence.

• Lead the designand implementation of complex routing solutions utilizing:
• BGP
• OSPF
• MPLS
• Multicast(PIM-SM/SSM)
• Traffic Engineering
• High Availability Network Architectures
• Optimize network performance, latency, jitter, and traffic flow across global environments.

• Conduct proof-of-concept testing, lab validation, and technical evaluations of emerging technologies.
• Analyze network behavior, platform limitations, and hardware capabilities to improve exchange connectivity and trading performance.
• Validate architecture designs before production deployment to minimize operational risk.

• Lead large-scale network transformation initiatives from design through implementation.
• Develop detailed technical designs, migration plans, implementation runbooks, and capacity planning documentation.
• Own complex technical challenges end-to-end with minimal oversight.

• Design and maintain Python-based network automation solutions for:
• Configuration management
• Change validation
• Compliance verification
• Operational efficiency
• Automated testing
• Leverage bothAPI-driven and SSH-based automation methodologies.

• Partner with Infrastructure, Security, Cloud, Application, and Trading teams to align network capabilities with business objectives.
• Support strategic planning, budgeting, and technology investment decisions relatedto network infrastructure.

• Act as a senior technical mentor across the engineering organization.
• Lead architecture reviews, establish engineering standards, and promote knowledge sharing.
• Influence technical direction without direct management responsibilities.

• Define network telemetry and observability standards.
• Utilize toolssuch as Prometheus, Grafana, and similar platforms to improve visibility,performance monitoring, and troubleshooting.

• Develop and maintain technical standards, architecture documentation, and operational procedures.
• Contribute toaudit, compliance, and regulatory documentation, including materials supporting SEC and related regulatory reviews.

• 10+ years ofhands-on Network Engineering experience within mission-critical,low-latency environments.
• Direct experience supporting High-Frequency Trading (HFT), Electronic Trading,Market Making, Proprietary Trading, or Capital Markets infrastructure.
• Deep expertise in low-latency network design with extensive experience analyzing:
• Network latency
• Jitter
• Packet loss
• End-to-end traffic behavior
• Expert-level knowledge of:
• BGP
• OSPF
• MPLS
• Multicast Technologies
• Global Network…