Linux Engineer

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

• Bachelors degree in Computer Science Information Technology or related field.
• 510 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.