Senior Linux System Administrator

**Principal Linux Engineer** Our client is a leading global financial markets and technology organisation operating highly available, business\-critical infrastructure globally. We are looking for a **Principal Linux Engineer** to take senior technical ownership of large\-scale Linux infrastructure, driving platform reliability, resilience, performance and operational excellence. **Key Responsibilities** * Own the reliability, availability and performance of large\-scale Linux environments. * Act as the **senior technical authority** for complex Linux issues and major production incidents. * Lead infrastructure upgrades, patching, failover, recovery and lifecycle management. * Drive automation and operational improvements using **Python, Bash/Shell and Ansible/Puppet/Salt** . * Support enterprise **bare\-metal servers, storage and high\-availability infrastructure** . * Drive monitoring, observability, capacity management and infrastructure resilience. * Partner with Engineering, SRE, Security and Infrastructure teams on platform improvements. * Provide technical guidance and mentorship to engineering teams. **Requirements** * **8\+ years** of Linux infrastructure / systems engineering experience in large\-scale 24x7 environments. * Deep expertise in **Linux, performance tuning, troubleshooting and system fundamentals** . * Strong experience with **Ansible, Puppet or Salt** . * Strong **Python and Shell/Bash scripting** skills. * Experience with **bare\-metal servers, SAN/NAS, RAID and NVMe** . * Exposure to **Grafana, Prometheus, AWS/GCP, Docker and Kubernetes** . * Experience with **Terraform, Git and CI/CD** . * Strong experience managing **critical incidents, production environments and high\-availability infrastructure** . * Ability to operate as a **technical leader and subject matter expert** in a complex global environment. **Work Schedule:** Wednesday–Sunday, 7:00 AM–4:00 PM SGT, including weekend operational support.