Responsibilities

• Linux Systems Administration: Install, configure, patch, and maintain RHEL/Fedora servers and related infrastructure.
• Performance & Low-Latency Tuning: Perform network/system/kernel tuning for ultra-low-latency workloads; develop benchmarks and monitoring/observability dashboards.
• Scripting & Automation: Develop reliable Bash, Python, and Perl scripts for routine operations, troubleshooting/diagnostics, and internal tooling.
• Configuration Management: Build and maintain Ansible playbooks or Salt states (Salt preferred); ensure idempotent configuration across large node fleets (hundreds of nodes).
• Virtualization & Cloud: Deploy and manage Proxmox clusters; create and maintain VMs and containers; integrate with AWS services when relevant.
• Network Engineering: Implement and troubleshoot advanced networking, including VLANs, bonding/NIC teaming, SR-IOV, TCP/UDP tuning, and QoS. Cisco and Fortinet experience is a plus.
• Storage Engineering: Administer and troubleshoot SAN/NAS and block storage via iSCSI. Perform LUN masking, multipathing, and Linux host performance tuning. HPE SAN experience is a plus.
• Incident Response: Respond to production incidents promptly (including some after-hours/weekend coverage).
• Documentation & Knowledge Sharing: Create clear runbooks, SOPs, and technical documentation; mentor junior engineers.
• Security & Compliance: Apply hardening standards, manage SELinux where required, and support audit/compliance requirements.

What You Bring

• Bachelor's degree in Computer Science, Information Technology, or related field.
• 5–10 years of professional Linux engineering experience with RHEL/Fedora.
• Strong problem-solving skills; able to work independently and collaboratively; proactive approach to automation and continuous improvement.
• Strong networking fundamentals: TCP/IP, routing, switching, and firewalls.
• Proven experience with system/kernel/network performance tuning, including low-latency optimization.
• Hands-on experience with Proxmox (preferred) or comparable virtualization platforms (KVM, VMware).
• Advanced scripting skills in Bash, Python, and Perl.
• Demonstrated experience with Ansible or Salt (Salt preferred).
• Experience with container technologies (Docker, LXC/LXD).
• Familiarity with monitoring/observability stacks: Prometheus, Grafana, Zabbix, LibreNMS.
• Knowledge of security frameworks such as CIS and NIST.
• Experience with Windows networking.
• Working knowledge of AWS services (EC2, VPC, S3) is a plus.
• Prior experience in high-frequency trading and financial services is a plus.
• Fluency in English; Mandarin and/or Cantonese fluency is a plus.