Job Description
As a Linux Engineer in the Global Linux team, you will design, build and operate the critical infrastructure that powers our trading environment. The team owns both large-scale bare-metal Linux platforms and on-prem Kubernetes clusters across our global datacenters.
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What you'll do
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Design, deploy and operate on-prem Kubernetes clusters in a bare-metal environment (Rancher-managed)
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Maintain and improve our bare-metal Linux infrastructure, including provisioning, lifecycle management and performance tuning
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Own and operate core Kubernetes components including Cilium (CNI), ArgoCD (GitOps), and Rancher
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Build and maintain CI/CD workflows for infrastructure and cluster deployments using ArgoCD and GitHub Actions
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Develop and maintain infrastructure as code using Terraform and bespoke on-prem systems
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Participate in on-call rotation covering both Kubernetes clusters and other Linux-based production systems
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Drive reliability, scalability and performance improvements across both containerized and non-containerized workloads
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Contribute to monitoring, observability and security posture across the Linux and Kubernetes platforms
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Ensure the broader team can effectively operate and support the Kubernetes and Linux platforms by building explicit documentation, operational runbooks, and providing practical, hands‐on guidance
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Who you are
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Strong Linux systems engineering experience in production environments
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Hands‐on experience operating Kubernetes on‐prem (not only managed cloud offerings)
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Experience with:
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Rancher
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Cilium or other CNI technologies
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ArgoCD (GitOps workflows)
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Terraform
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CI/CD systems such as GitHub Actions
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Solid understanding of networking fundamentals (L2/L3, routing, firewalls, load balancing)
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Experience troubleshooting performance issues across kernel, container and network layers
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Production mindset with experience in incident response and post‐mortem driven improvements
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Nice to have
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Experience building monitoring stacks (e.g. Prometheus, Grafana)
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Experience with Kubernetes security controls (network policies, RBAC, policy engines)
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Knowledge of low‐latency or performance‐sensitive environments
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Experience contributing to internal platform tooling
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No prior trading or financial experience is needed – our onboarding program will kick‐start your career at Optiver and support you in gaining all the relevant knowledge about our business.
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Who We Are
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At Optiver, our mission is to constantly improve the market by injecting liquidity, providing accurate pricing, increasing transparency and acting as a stabilizing force no matter the market conditions. With a focus on continuous improvement, we participate in the safeguarding of healthy and efficient markets for

📌 Linux Systems Engineer - Bare Metal & Kubernetes (New South Wales)
🏢 Optiver
📍 New South Wales