UNIX / Linux L3 Engineer

Rapsys Technologies Pte Ltd.; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

Rapsys Technologies Pte Ltd. in Singapore is seeking a skilled UNIX/Linux L3 Engineer to manage complex UNIX/Linux systems, troubleshoot advanced issues, and ensure peak performance.

The role requires on-site work in Singapore and close collaboration with cross-functional teams to support production, testing, and deployment activities. The ideal candidate will have strong Linux administration, scripting (Shell/Python), experience with HA clustering (Veritas), and storage expertise (SAN/NAS,

Qualifications

• Proven UNIX/Linux server build, configuration and security hardening experience.

Responsibilities

• Install, configure, and harden UNIX/Linux servers for development, test, UAT and production environments.

Skills

Linux Administration

RHEL/Oracle Linux

UNIX/Linux server build

Shell scripting

Python automation

High Availability

Veritas Cluster/VCS

Storage SAN/NAS & LVM

L3 troubleshooting

Tools

AWS

Azure

VMware

Veritas Cluster

SAN/NAS

LVM

Job description

We're Hiring: UNIX / Linux L3 Engineer!

We are looking for a skilled and motivated UNIX / Linux L3 Engineer to join our dynamic team in Singapore. The ideal candidate will have a strong background in managing complex UNIX and Linux systems, troubleshooting advanced issues, and ensuring optimal system performance. If you are passionate about technology and enjoy working in a fast-paced environment, we want to hear from you!

Location: Singapore, Singapore
Work Mode: Work from Office
Role: UNIX / Linux L3 Engineer

What You'll Do:

Key Responsibilities

Infrastructure Build & Implementation

• Install, configure, and harden UNIX/Linux servers.
• Build and configure Development, Test, UAT, and Production environments.
• Configure server storage, networking, security, and system services.

Project & L3 Support

• 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.

Automation

• Develop Shell and Python scripts for server provisioning and operational automation.
• Implement configuration management and Infrastructure-as-Code (IaC) practices.
• Standardise server builds and deployment procedures.

Security & Compliance

• Implement OS hardening and security best practices.
• Perform patching and vulnerability remediation.
• Ensure compliance with organisational and regulatory security standards.

Documentation

• Create and maintain Technical Design Documents (TDDs), SOPs, build documents, runbooks, and knowledge articles.
• Provide knowledge transfer to operations and support teams.

Must-Have Skills

• Strong Linux Administration, particularly RHEL / Oracle Linux.
• Strong experience in UNIX/Linux server build, configuration, and security hardening.
• Strong Shell Scripting and Python automation skills.
• Experience with High Availability and Clustering, preferably Veritas Cluster / VCS FSS.
• Experience with Storage: SAN/NAS and LVM.
• Strong troubleshooting and L3 support experience.

Good to Have

• Experience with AWS, Azure, and VMware.
• Infrastructure-as-Code and configuration management experience.
• IBM MQ experience.
• Disaster Recovery and capacity/performance management experience.