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.You will play a key role in evolving our Kubernetes platform while continuing to support and improve our high-performance Linux estate.What you'll doDesign, deploy and operate on-prem Kubernetes clusters in a bare-metal environment (Rancher-managed)Maintain and improve our bare-metal Linux infrastructure, including provisioning, lifecycle management and performance tuningOwn and operate core Kubernetes components including Cilium (CNI), ArgoCD (GitOps), and RancherBuild and maintain CI/CD workflows for infrastructure and cluster deployments using ArgoCD and GitHub ActionsDevelop and maintain infrastructure as code using Terraform and bespoke on-prem systemsParticipate in on-call rotation covering both Kubernetes clusters and other Linux-based production systemsDrive reliability, scalability and performance improvements across both containerized and non-containerized workloadsContribute to monitoring, observability and security posture across the Linux and Kubernetes platformsEnsure the broader team can effectively operate and support the Kubernetes and Linux platforms by building explicit documentation, operational runbooks, and providing practical,



hands‐on guidanceWho you areStrong Linux systems engineering experience in production environmentsHands‐on experience operating Kubernetes on‐prem (not only managed cloud offerings)Experience with:RancherCilium or other CNI technologiesArgoCD (GitOps workflows)TerraformCI/CD systems such as GitHub ActionsSolid understanding of networking fundamentals (L2/L3, routing, firewalls, load balancing)Experience troubleshooting performance issues across kernel, container and network layersProduction mindset with experience in incident response and post‐mortem driven improvementsNice to haveExperience building monitoring stacks (e.g. Prometheus, Grafana)Experience with Kubernetes security controls (network policies, RBAC, policy engines)Knowledge of low‐latency or performance‐sensitive environmentsExperience contributing to internal platform toolingNo 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.Who We AreAt 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
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📌 Linux Systems Engineer - Bare Metal & Kubernetes (Sydney)
🏢 Optiver
📍 Sydney