Linux Low Latency Systems Engineer

Millennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.

Our people are empowered with both independence and support: the autonomy to pursue ideas with conviction and the backing of a global network committed to collaboration, disciplined risk management and continuous learning. With opportunities to deepen expertise and accelerate development, talent at Millennium is equipped to adapt, evolve and build lasting impact over time. Discover how transformative growth accelerates impact.

Meet the Team

Core to the health and growth of our business, Millennium’s active, multi-manager business model depends on flexible, scalable technology and advanced proprietary systems. Within that environment, the Latency Critical Trading team delivers high-performance trading capabilities through core infrastructure, software development, automation, security, and cloud-based services. The team brings together experienced C++, Linux, networking, and SRE professionals focused on building a stable, high-performing platform for portfolio managers, researchers, and technologists, with a strong emphasis on continuous improvement, technical excellence, and collaboration.

What You'll Do

• Support and maintain Linux, virtualization, and related infrastructure as part of a globally deployed engineering team
• Build, operate, and continuously improve a high-performance, low-latency trading platform in partnership with infrastructure and application support teams
• Identify, prioritize, and resolve complex incidents and service requests, while proactively addressing root causes to prevent recurrence
• Gather requirements, evaluate technical options, and implement solutions aligned with business and platform needs
• Monitor platform health and performance, investigate latency and performance issues using diagnostic tools, and drive remediation
• Deliver stable, repeatable, and high-performing Linux systems through automation and code-driven engineering practices
• Lead technical discussions, communicate clearly with stakeholders, and partner across engineering, development, and business teams to solve complex problems
• Produce clear documentation, guide teammates on low-latency and high-performance computing concepts, and participate in off-hours on-call support as needed

• 5+ years of hands-on experience in financial technology services, including 3+ years supporting low-latency trading systems and scalable infrastructure
• Deep Linux systems engineering expertise, including performance tuning, low-latency networking, Solarflare OpenOnload, multicast networking, cgroups/cpusets, kernel parameters, and BIOS-level tuning
• Hands-on experience with enterprise server platforms, VMware ESXi/vCenter, networking, DNS, and time-synchronization services including NTP, PTP, PPS, and WR
• NVIDIA GPU/CUDA experience for Linux infrastructure and performance-sensitive workloads
• Experience using AI assistants in daily engineering work, including troubleshooting, coding/scripting, terminal workflows, and operational automation
• Strong Python and Bash scripting skills, with Ansible configuration-management experience; Chef, Puppet, and Terraform are a plus
• Proven ability to troubleshoot across the technology stack, coordinate production changes across teams, and maintain clear documentation and operational excellence in fast-paced environments
• Bachelor’s degree in Engineering, Computer Science, or a related field—or equivalent practical experience; RHCE, cloud-platform experience, and Windows–Linux interoperability exposure are a plus