Senior Linux Engineer

We are looking for a passionate technically talented individual to join our Infrastructure and Technology Services team. The successful candidate will work closely with our trading support and development teams to ensure that our systems deliver the required performance availability and security posture.

This is an onsite role located in Hong Kong Shanghai or Sydney (with authorization to work in Shanghai or Sydney).

Responsibilities and Duties:

• Linux System Administration: Install configure patch and maintain
  RHEL/Fedora servers.
• Performance & Low-Latency Tuning: Conduct network system and kernel tuning for ultra-low-latency workloads; develop benchmarks and monitoring dashboards.
• Scripting & Automation: Write robust Bash Python and Perl scripts for routine tasks diagnostics and custom tooling.
• Configuration Management: Build and maintain Ansible playbooks or Salt states (Salt preferred); enforce idempotent configurations across hundreds of nodes.
• Virtualisation & Cloud: Deploy and manage Proxmox clusters; create/maintain VMs and containers; integrate with AWS services where applicable.
• Network Engineering: Implement and troubleshoot advanced networking (VLANs bonding NIC teaming SR-IOV TCP/UDP tuning QoS). Cisco networking and Fortinet experience is a plus.
• Storage Engineering: Manage and troubleshoot SAN and NAS storage solutions and block-level storage using iSCSI. Perform LUN masking multipathing and performance tuning for Linux hosts. HPE SAN experience a plus.
• Incident Response: Provide timely response to production incidents; some after-hours/weekend work is required.
• Documentation & Knowledge Sharing: Produce clear runbooks SOPs and technical documentation; mentor junior engineers.
  Security & Compliance: Apply hardening guidelines manage SELinux where required and support audit requirements.

Requirement:

• Minimum Bachelors degree in Computer Science Information Technology or a related field.
• 510years of professional Linux engineering experience (RHEL/Fedora).
• Strong problem-solving skills ability to work independently and as part of a team and a proactive attitude toward automation and improvement.
• Strong networking fundamentals (TCP/IP routing switching firewalls).
  System kernel and network performance tuning (including low-latency).
• Hands-on experience with Proxmox (preferred) or comparable platforms (KVM VMware).
• Advanced Bash Python and Perl scripting.
• Proven experience with Ansible or Salt (Salt preferred).
• Experience with container technologies (Docker LXC/LXD).
• Familiarity with monitoring stacks (Prometheus Grafana Zabbix LibreNMS).
• Knowledge of security frameworks (CIS NIST).
• Experience with Windows networking.
• Working knowledge of AWS services (EC2 VPC S3) is nice to have.
• Prior work in high-frequency trading and financial services is nice to have.
• Fluency in English. Mandarin and Cantonese fluency are nice to have.