Linux Low Latency Systems Engineer

About Millennium

Millennium is a global, diversified alternative investment firm founded in 1989. Recognized for its evolution, innovative approach, and focus, the company's mission centers on delivering outstanding results for its investors. Employees at Millennium benefit from a balance of autonomy and collaborative support, fostering an environment that encourages the pursuit of innovative ideas and continuous development. The firm offers opportunities for deepening expertise and accelerated personal growth, preparing talent to adapt and create long-lasting impact.

Meet the Team

The Latency Critical Trading team is essential to the robustness and expansion of Millennium's business. Operating within a flexible, scalable technological framework supported by advanced proprietary systems, the team is responsible for delivering high-performance trading capabilities. This is achieved through an integrated approach combining core infrastructure, software development, automation, security, and cloud technologies. The team includes seasoned professionals skilled in C++, Linux, networking, and Site Reliability Engineering (SRE), all dedicated to maintaining a stable, efficient platform for portfolio managers, researchers, and technologists. Collaboration, technical mastery, and ongoing refinement are key values within the team.

Responsibilities

• Maintain and support Linux, virtualization, and related infrastructure as part of a global engineering group.
• Develop, manage, and continuously enhance a high-performance, low-latency trading platform collaborating closely with infrastructure and application teams.
• Diagnose, prioritize, and resolve complex incidents and service requests, while proactively addressing underlying issues to avoid repetitions.
• Collect requirements, assess technical alternatives, and implement solutions that align with platform and business objectives.
• Monitor system health and performance, investigate latency and throughput challenges using diagnostic tools, and initiate corrective actions.
• Deliver consistent, reliable, and high-performing Linux systems utilizing automation and source-driven engineering practices.
• Lead technical discussions, clearly communicate with stakeholders, and collaborate across engineering, development, and business units to resolve difficult problems.
• Produce detailed documentation, mentor colleagues on concepts related to low-latency and high-performance computing, and provide off-hours on-call support when required.

Qualifications and Experience

• A minimum of 5 years of practical experience in fintech environments, including at least 3 years supporting low-latency trading systems and scalable infrastructures.
• Extensive Linux systems engineering knowledge encompassing performance tuning, low-latency networking techniques, Solarflare OpenOnload, multicast protocols, cgroups/cpusets, kernel parameter tuning, and BIOS-level optimizations.
• Practical experience with enterprise server hardware platforms, VMware ESXi/vCenter virtualization, networking fundamentals, DNS, and time synchronization methods such as NTP, PTP, PPS, and WR.
• Experience working with NVIDIA GPU and CUDA technologies applied to Linux infrastructure and latency-sensitive workloads.
• Usage of AI assistants for daily engineering tasks including troubleshooting, programming/scripting, terminal operations, and automating processes.
• Strong proficiency in Python and Bash scripting, with experience in Ansible for configuration management; familiarity with Chef, Puppet, and Terraform is advantageous.
• Demonstrated capability to troubleshoot multilayer technology stacks, coordinate cross-team production changes, maintain precise operational documentation, and work effectively in dynamic, fast-paced settings.
• Bachelor’s degree in Engineering, Computer Science, or a similar field or equivalent professional experience; certifications like RHCE, exposure to cloud platforms, and experience integrating Windows and Linux systems are beneficial.