Senior UNIX/Linux L3 Engineer - Automation & Security

RAPSYS TECHNOLOGIES PTE LTD; Singapore; On-site; SGD 60,000 - 100,000; Full time

Job summary

RAPSYS TECHNOLOGIES PTE LTD in Singapore is seeking a skilled UNIX / Linux L3 Engineer to manage complex UNIX and Linux systems, troubleshoot advanced issues, and ensure optimal performance in a fast-paced environment. Work from Office in Singapore, collaborating with cross-functional teams to deliver reliable infrastructure.

The role focuses on building, securing, and maintaining UNIX/Linux environments, scripting for automation, and implementing IaC to streamline deployments.

Qualifications

• Strong Linux administration, specifically RHEL/Oracle Linux.
• Experience in UNIX/Linux server build, configuration and security hardening.
• Proficient in Shell scripting and Python automation.
• Experience with high availability and clustering (Veritas Cluster / VCS FSS).
• Experience with SAN/NAS storage and LVM.
• Strong troubleshooting and L3 support skills.

Responsibilities

• Install, configure, and harden UNIX/Linux servers.
• Build and configure Development, Test, UAT, and Production environments.
• Configure server storage, networking, security, and system services.
• Provide L3 infrastructure support and resolve complex server issues.
• Collaborate with application, database, network, cloud, and security teams.
• Support infrastructure planning, design reviews, deployments, and cutover activities.
• Ensure infrastructure readiness for application onboarding and releases.
• Develop Shell and Python scripts for provisioning and automation.
• Implement Infrastructure-as-Code (IaC) practices and standardise server builds.
• Create and maintain Technical Design Documents (TDDs), SOPs, build documents, runbooks, and knowledge articles.

Skills

Linux Administration

RHEL/Oracle Linux

UNIX/Linux server build

Shell Scripting

Python automation

High Availability / Clustering

Veritas Cluster / VCS FSS

SAN/NAS / LVM

Troubleshooting / L3 support

AWS/Azure/VMware

Job description

RAPSYS TECHNOLOGIES PTE LTD in Singapore is seeking a skilled UNIX / Linux L3 Engineer to manage complex UNIX and Linux systems, troubleshoot advanced issues, and ensure optimal performance in a fast-paced environment. Work from Office in Singapore, collaborating with cross-functional teams to deliver reliable infrastructure.

The role focuses on building, securing, and maintaining UNIX/Linux environments, scripting for automation, and implementing IaC to streamline deployments.