UNIX L3 Engineer

RAPSYS TECHNOLOGIES PTE. LTD.; Singapore; On-site; SGD 67,000 - 123,000; Full time

Job summary

RAPSYS TECHNOLOGIES PTE. LTD. in Singapore is seeking a skilled UNIX/Linux administrator to install, configure, and harden RHEL and Oracle Linux servers. You will build robust infrastructures, automate provisioning with Shell and Python, and support deployment, onboarding, and cutover activities.

The role emphasizes IaC, security hardening, patching, and high availability, with responsibilities spanning design, documentation, and transfer of knowledge to operations teams.

Qualifications

• Focused Linux admin skills covering RHEL and Oracle Linux, with server build and security hardening.
• Scripting and automation for provisioning and operations using Shell and Python.
• Experience patching, vulnerability remediation, and configuration management.
• Ability to support infrastructure deployment and capacity planning.

Responsibilities

• Install, configure, build, and harden UNIX/Linux servers.
• Configure storage, networking, security, and system services.
• Support project planning, design reviews, deployment, onboarding, and cutovers.
• Develop shell scripts and Python automation for provisioning.
• Implement IaC, configuration management, and standard build procedures.
• Perform OS patching, vulnerability remediation, and security checks.
• Support high availability, clustering, capacity planning, and monitoring.
• Prepare design documents, SOPs, DR docs, and runbooks.
• Provide knowledge transfer to operations and support teams.

Skills

Linux administration

UNIX/Linux server build

Shell scripting

Python automation

Server provisioning

Patching & remediation

Tools

VMware

AWS

Azure

Veritas Clustering

SAN/NAS

LVM

Job description

Key Responsibilities

• Install, configure, build, and harden UNIX/Linux servers, including RHEL and Oracle Linux.

• Configure storage, networking, security, and system services.

• Support project planning, design reviews, deployment, application onboarding, and cutover activities.

• Develop shell scripts and Python automation for server provisioning and operational tasks.

• Implement configuration management, Infrastructure as Code (IaC), and standardized build procedures.

• Perform OS patching, vulnerability remediation, and security compliance checks.

• Support high availability, clustering, capacity planning, and performance monitoring.

• Prepare technical design documents, build documents, SOPs, disaster recovery documentation, and operational runbooks.

• Provide knowledge transfer to operations and support teams.

Must-Have Skills

• Linux administration: RHEL and Oracle Linux.

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

• Shell scripting and Python automation.

• Server provisioning, patching, and vulnerability remediation.

• Infrastructure implementation and deployment support.

Good to Have

• High availability and clustering: Veritas Cluster / VCS.

• VMware, AWS, and Azure.

• Storage administration: SAN/NAS and LVM.

• Infrastructure as Code and configuration management.

• IBM MQ.