On-Prem Linux & Kubernetes Engineer (Bare-Metal)

Optiver; Sydney; On-site; AUD 140,000 - 200,000; Full time

Benefits offered by this job

Performance bonus

Global team collaboration

Training opportunities

Health insurance discounts

Fully paid commuting expenses

Office perks: meals, coffee, massages

Job summary

Optiver is seeking a Linux Systems Engineer to design, build, and operate our on-prem Kubernetes clusters and bare-metal Linux platforms across global datacenters. You will own core Kubernetes components, contribute to IaC with Terraform, and maintain CI/CD workflows using ArgoCD and GitHub Actions.

The role emphasizes high-performance, low-latency infrastructure with on-call rotation, strong focus on reliability, security posture, and documentation to empower the team.

Qualifications

• Strong Linux systems engineering experience in production environments.
• Hands-on experience operating on-prem Kubernetes (not only managed cloud offerings).
• Experience with Rancher, Cilium or other CNI technologies, ArgoCD (GitOps), Terraform, CI/CD with GitHub Actions.
• Solid understanding of L2/L3 networking, routing, firewalls and load balancing.
• Experience troubleshooting performance across kernel, container and network layers.
• Production mindset with incident response and post-mortem driven improvements.

Responsibilities

• Design, build and operate on-prem Kubernetes clusters in a bare-metal environment (Rancher-managed).
• Maintain and optimise bare-metal Linux infrastructure, including provisioning and lifecycle management.
• Own Kubernetes components (Cilium, ArgoCD, Rancher) and CI/CD workflows (ArgoCD, GitHub Actions).
• Develop infrastructure as code with Terraform and bespoke on-prem systems.
• Participate in on-call rotation for Kubernetes clusters and Linux production systems.
• Drive reliability, scalability and performance improvements for containerised and non-containerised workloads.
• Contribute to monitoring, observability and security posture; build docs and runbooks.

Skills

Linux systems engineering

Kubernetes on-prem

Rancher

Cilium (CNI)

ArgoCD (GitOps)

Terraform

GitHub Actions

Networking fundamentals

Incident response

Tools

Rancher

Cilium

ArgoCD

Terraform

GitHub Actions

Prometheus

Job description

Optiver is seeking a Linux Systems Engineer to design, build, and operate our on-prem Kubernetes clusters and bare-metal Linux platforms across global datacenters. You will own core Kubernetes components, contribute to IaC with Terraform, and maintain CI/CD workflows using ArgoCD and GitHub Actions.

The role emphasizes high-performance, low-latency infrastructure with on-call rotation, strong focus on reliability, security posture, and documentation to empower the team.