Latency-Critical Linux Systems Engineer

Millennium; Hong Kong; On-site; HKD 900,000 - 1,500,000; Full time

Job summary

Millennium is seeking a senior Linux systems engineer to join our latency-critical trading platform team in Hong Kong. You will support and grow a globally deployed infrastructure, focusing on high performance, stability, and automation.

You will lead engineering discussions, diagnose complex incidents, and document solutions while collaborating with cross-functional teams. The ideal candidate has 5+ years in financial tech, deep Linux tuning, and strong scripting with Python and Bash.

Qualifications

• 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.
• 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

Responsibilities

• 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

Skills

Linux

Low-latency

Python

Bash

Ansible

Terraform

Education

Bachelor's degree in Engineering or Computer Science

Tools

VMware ESXi/vCenter

NVIDIA GPU/CUDA

Solarflare OpenOnload

Ansible

Terraform

Job description

Millennium is seeking a senior Linux systems engineer to join our latency-critical trading platform team in Hong Kong. You will support and grow a globally deployed infrastructure, focusing on high performance, stability, and automation.

You will lead engineering discussions, diagnose complex incidents, and document solutions while collaborating with cross-functional teams. The ideal candidate has 5+ years in financial tech, deep Linux tuning, and strong scripting with Python and Bash.