Low Latency Network Engineer

London, England, United Kingdom

6/17/2025

We are seeking an experienced Network Engineer to join our latency-critical trading infrastructure team. As part of a global follow-the-sun team of network engineers across North America, EMEA, and APAC, the Network Engineer will focus on the architecture, design, development, deployment, and support of Millennium’s high-performance global networks. These networks have extreme uptime requirements and utilize cutting-edge technologies. This role encompasses all aspects of networking, including datacenters, market data, co-location (co-lo), and proximity colocation sites.

• Principal Responsibilities
• Senior Engineering Role:
• Focus on low-latency network technologies with a balanced mix of project work and operations in the low-latency trading environment, including Market Data, Trading, and co-lo design.
• Project Management:
• Own and manage global network projects from start to finish, including requirement gathering, design, cost analysis, implementation, and deployment.
• Innovation Leadership:
• Lead research and innovation efforts to introduce new network technologies into the firm, including RF technologies, low-latency transport, routing/switching, and compute technologies.
• Network Configuration and Support:
• Configure, install, maintain, and support critical network software and hardware components.
• Research, price out, and implement data circuits.
• Design and implement high-availability, low-latency Market Data networks.
• Operations and Troubleshooting:
• Deploy, support, and troubleshoot the network infrastructure.
• Document the IT infrastructure, policies, and procedures.
• Provide general user support and participate in after-hours work and an on-call rotation.
• Qualifications/Skills Required
• Technical Expertise:
• Expert in low-latency network technologies, including Multicast (IGMP, PIM), L2/L3, and WAN design.
• Expert in routing protocols such as BGP and OSPF.
• Experience with Arista, Cisco, including Layer 1 switches.
• Knowledge of FPGA and high-performance computing technologies is a plus.
• Strong understanding of time synchronization protocols, including Precision Time Protocol (PTP, WR) and PPS, and their role in low-latency environments.
• Experience with network automation tools and frameworks, including Python, Ansible, or similar technologies.
• Experience leveraging AI/ML-driven tools for network performance optimization, anomaly detection, and predictive analytics. Understanding of AI frameworks and libraries (e.g., TensorFlow, PyTorch, Scikit-learn) and their application in network automation and monitoring.
• Experience with telemetry and observability frameworks (e.g., Prometheus, Grafana) for real-time network monitoring and troubleshooting.
• Experience:
• Minimum of 7 years’ of experience in network engineering, operations, and support.
• Proven ability to work hands-on and take strong technical ownership in a global organization.
• Networking and Troubleshooting:
• Expert knowledge of IP networking, TCP/IP, and troubleshooting.
• Experience with Python and Bash scripting to automate tasks.
• Strong Linux shell experience.
• Soft Skills:
• Strong interpersonal and written communication skills.
• Proven ability to operate in a fast-paced environment.
• Passion for delivering high levels of service and support to internal customers.