# Linux Systems Engineer - Bare Metal & Kubernetes - Company: [Optiverus]() - Location: Sydney, Australia - Team: Infrastructure - Posted: September 8, 2026 ## 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. 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 do Design, 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 tuning * Own and operate core Kubernetes components including **Cilium (CNI), ArgoCD (GitOps), and Rancher** * Build and maintain CI/CD workflows for infrastructure and cluster deployments using **ArgoCD and GitHub Actions** * Develop and maintain infrastructure as code using **Terraform and bespoke on-prem systems** * Participate in on-call rotation covering both Kubernetes clusters and other Linux-based production systems * Drive reliability, scalability and performance improvements across both containerized and non-containerized workloads * Contribute to monitoring, observability and security posture across the Linux and Kubernetes platforms * Ensure the broader team can effectively operate and support the Kubernetes and Linux platforms by building clear documentation, operational runbooks, and providing practical, hands-on guidance --- ### Who you are * Strong Linux systems engineering experience in production environments * Hands-on experience operating **Kubernetes on-prem (not only managed cloud offerings)** * Experience with: + **Rancher** + **Cilium or other CNI technologies** + **ArgoCD (GitOps workflows)** + **Terraform** + CI/CD systems such as **GitHub Actions** * Solid understanding of networking fundamentals (L2/L3, routing, firewalls, load balancing) * Experience troubleshooting performance issues across kernel, container and network layers * Production mindset with experience in incident response and post-mortem driven improvements Nice to have * Experience building monitoring stacks (e.g. Prometheus, Grafana) * Experience with Kubernetes security controls (network policies, RBAC, policy engines) * Knowledge of low-latency or performance-sensitive environments * Experience contributing to internal platform tooling *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.* **Who we are** 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 everyone who participates. As one of the largest market making institutions, we are a trusted partner of 70+ exchanges across the globe. **What you'll get** You’ll join a culture of collaboration and excellence, where you’ll be surrounded by curious thinkers and creative problem solvers. Motivated by a passion for continuous improvement, you’ll thrive in a supportive, high-performing environment alongside talented colleagues, working collectively to tackle the toughest problems in the financial markets. In addition, you’ll receive: * A performance-based bonus structure, enabling all of our employees to benefit from our global profit pool. * The opportunity to work alongside best-in-class professionals from over 50 different countries. * Training opportunities, discounts on health insurance, and fully paid first-class commuting expenses. * Extensive office perks, including breakfast, lunch and dinner, world-class barista coffee, in-house physio and chair massages, organized sports and leisure activities. * Training and continuous learning opportunities, including access to conferences and tech events. Please note: * We do not require any assistance from third-parties including agencies in the recruitment of this role * We cannot accept applications via email **Diversity statement** Optiver is committed to [diversity and inclusion](https://optiver.com/diversity-statement/). We encourage applications from candidates of all backgrounds, and welcome requests for reasonable adjustments during the process. **Questions?** Get in touch with the recruitment team at [careers@optiver.com.au](mailto:careers@optiver.com.au). Personal information protection is of utmost importance to Optiver. Before you provide any personal information to us, we strongly urge you to read our [Privacy Policy](https://optiver.com/privacypolicy/) to acknowledge how we collect and process your personal information. ## Apply [Apply on Optiverus]() Canonical job page: