Principal Linux Engineer (Senior Linux System Administrator)

About the role

Our client is a leading global financial markets and technology organisation operating highly available, business‑critical infrastructure worldwide. 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.

Required profile

• 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 pipelines.
• Proven ability to manage critical incidents and high‑availability production environments.
• Work schedule: Wednesday–Sunday, 7:00 AM–4:00 PM SGT, including weekend operational support.

Required skills

• Linux
• Python
• Bash/Shell scripting
• Ansible
• Puppet
• Salt
• Terraform
• Docker
• Kubernetes
• AWS
• GCP
• Grafana
• Prometheus
• CI/CD
• Git
• bare‑metal servers
• SAN/NAS
• RAID
• NVMe