Linux Systems Engineer — On-Prem Kubernetes & Bare-Metal

Optiver; Sydney; On-site; AUD 140,000 - 210,000; Full time

Benefits offered by this job

Performance-based bonus

Global team from 50+ countries

Training opportunities

Fully paid commuting expenses

Office perks and on-site amenities

Job summary

Optiver in Sydney is seeking a Linux Systems Engineer to design, build and operate on-prem Kubernetes clusters and bare-metal Linux infrastructure powering our trading environment. You will work with Rancher, Cilium, ArgoCD, Terraform and GitHub Actions to improve reliability, performance and security, while building clear runbooks and documentation for the team.

This role offers a collaborative, high-performance culture with opportunities to influence platform tooling and incident response

Qualifications

• Strong Linux systems engineering experience in production environments.
• Hands-on experience operating on-prem Kubernetes.
• Experience with Rancher, Cilium, ArgoCD, Terraform, and GitHub Actions.
• Solid networking knowledge (L2/L3, routing, firewalls, load balancing).
• Troubleshooting performance across kernel, container, and network layers.
• Production mindset with incident response experience.

Responsibilities

• Design, deploy and operate on-prem Kubernetes clusters in a bare-metal Rancher-managed environment.
• Maintain and improve bare-metal Linux infrastructure provisioning and performance.
• Own and operate core Kubernetes components including Cilium, ArgoCD, and Rancher.
• Build CI/CD workflows for infra deployments using ArgoCD and GitHub Actions.
• Develop infrastructure as code with Terraform and on-prem systems.
• Participate in on-call rotation for Kubernetes clusters and Linux production systems.
• Drive reliability, scalability and performance across containerized and non-container workloads.
• Create documentation, runbooks, and provide hands-on guidance for the team.

Skills

Linux systems engineering

On-prem Kubernetes

Rancher

Cilium

ArgoCD

Terraform

GitHub Actions

Networking fundamentals

Kernel/container performance

Incident response

Tools

Prometheus

Grafana

Job description

Optiver in Sydney is seeking a Linux Systems Engineer to design, build and operate on-prem Kubernetes clusters and bare-metal Linux infrastructure powering our trading environment. You will work with Rancher, Cilium, ArgoCD, Terraform and GitHub Actions to improve reliability, performance and security, while building clear runbooks and documentation for the team.

This role offers a collaborative, high-performance culture with opportunities to influence platform tooling and incident response