Unix L3 Engineer

RAPSYS TECHNOLOGIES PTE. LTD.; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

RAPSYS TECHNOLOGIES PTE. LTD. in Singapore seeks an experienced Infrastructure Build & Implementation professional to install, configure, and harden UNIX/Linux servers and to build project environments from development through production.

You will collaborate with application, database, network, cloud, and security teams to ensure readiness for onboarding and releases, develop automation, and implement IaC with emphasis on security best practices and compliance.

Qualifications

• Experience administering Linux/Unix servers (RHEL/Oracle Linux).
• Ability to build UNIX/Linux server configurations from scratch.
• Scripting in Shell and Python for automation tasks.

Responsibilities

• Install, configure, and harden UNIX/Linux servers.
• Build project environments (Dev, Test, UAT, Prod).
• Configure storage, networking, security, and system services.

Skills

Linux Administration

Unix server build

Shell scripting

Python automation

High availability

Cloud & virtualization

Storage administration

Tools

Veritas Cluster

AWS

Azure

VMware

Job description

Primary Skills :

• 1. Linux Administration (RHEL / Oracle Linux)
• 2. UNIX Server Build, Configuration & Security Hardening
• 3. Shell Scripting / Python Automation

Secondary Skills :

• 1. High Availability & Clustering (VCS FSS / Veritas Cluster)
• 2. Cloud & Virtualization (AWS, Azure, VMware)
• 3. Storage Administration (SAN/NAS, LVM)

JD:

Infrastructure Build & Implementation

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

Project Support

• - Collaborate with application, database, network, cloud, and security teams.
• - Participate in project planning, design reviews, and deployment activities.
• - Ensure infrastructure readiness for application onboarding and releases.

Automation & Standardization

• - Develop automation scripts for server provisioning and operational tasks.
• - Implement configuration management and Infrastructure-as-Code practices.
• - Standardize server builds and deployment procedures.

Security & Compliance

• - Implement OS hardening and security best practices.
• - Apply patches and remediate vulnerabilities.
• - Ensure compliance with organizational and regulatory standards.

Documentation & Knowledge Transfer

• - Create and maintain build documents, SOPs, and operational runbooks.
• - Provide knowledge transfer to operations and support teams.
• - Maintain project-related technical documentation.

Key Deliverables

• - UNIX/Linux Server Build and Configuration
• - Security Hardening Compliance
• - Automation Scripts and Playbooks
• - Deployment and Cutover Support
• - Capacity and Performance Reports
• - Disaster Recovery Documentation
• - Technical Design Documents (TDD)
• - Operational Run books and Knowledge Articles