Senior Unix System Administration

CHARTERHOUSE PTE. LTD.; Singapore; On-site; SGD 20,000 - 60,000; Full time

Job summary

A leading payment company in Singapore is seeking a Senior Unix System Administrator to ensure the stability and performance of critical systems. This position involves managing Unix/Linux systems, providing incident support, and engaging in disaster recovery planning. Candidates should have over 8 years of relevant experience and a Bachelor's degree in a related field. The company offers a competitive salary of up to SGD 9,000/month.

Benefits

Career growth opportunities

Work in a high-security environment

Part of a national payment infrastructure

Qualifications

• Minimum 8 years of experience in Unix/Linux system administration.
• Experience with SAN, OS hardening, patching, and backup solutions.
• Certifications in Unix/Linux system administration preferred.

Responsibilities

• Manage and maintain Unix and Linux-based systems across environments.
• Provide Level 2/3 support for incidents, resolving issues per SLA.
• Produce and maintain accurate technical documentation.

Skills

Unix/Linux expertise

Disaster recovery planning

Infrastructure monitoring

Scripting (Shell, Python)

Analytical skills

Education

Bachelor’s degree in Computer Science or related discipline

Job description

Job Title: Senior Unix System Administrator
Employment Type: Permanent

A leading payment company is seeking a Senior Unix System Administrator to join its Infrastructure Services Team. This role plays a critical part in maintaining the stability, security, and performance of the company’s core systems that support nationwide real-time and batch payment services.

The ideal candidate is a seasoned system administrator with strong experience in Unix/Linux environments, disaster recovery planning, and infrastructure monitoring in a regulated, high-availability environment.

Key Responsibilities

System Administration & Maintenance

• Manage and maintain Unix (Solaris) and Linux-based systems across production, DR, and test environments.
• Implement OS-level patches, security hardening, and system upgrades.
• Ensure scheduled backups and database archival for data recoverability and business continuity.
• Support disaster recovery strategy and execute regular DR drills.
• Monitor system obsolescence and manage password/certificate renewals.
• Maintain UAT environments and deployment tools for application updates.

Incident & Problem Management

• Provide Level 2/3 support for system-related incidents, resolving issues per SLA.
• Conduct root cause analysis and implement preventive measures.

Change & Release Management

• Coordinate deployment and release of system updates and application changes.
• Package and deploy applications using deployment automation tools.

Configuration, Capacity & Performance Management

• Maintain configuration records of all production infrastructure components.
• Monitor and tune system performance; plan for capacity upgrades when necessary.

Process & Project Support

• Align system processes with internal security and compliance policies.
• Provide infrastructure support to projects and enhancements.

Documentation

• Produce and maintain accurate technical documentation for systems and processes.

Requirements

• Bachelor’s degree in Computer Science, Information Technology, or a related discipline.
• Minimum 8 years of relevant experience in Unix/Linux system administration.
• Experience with SAN, OS hardening, patching, and backup solutions in enterprise settings.
• Strong scripting skills (e.g., Shell, Python) for automation on Unix/Linux platforms.
• Familiarity with database operations and data center processes is advantageous.
• Able to support 24/7 operations on a rotational basis, including weekends and off-hours.
• Effective communicator with strong analytical and troubleshooting skills.
• Certifications in Unix/Linux system administration are preferred.
• Cloud platform administration certifications are a plus (e.g., AWS, Azure).

Why Join?

• Be part of a national payment infrastructure serving millions daily.
• Work on critical systems in a high-availability and high-security environment.
• Career growth in a stable, reputable financial technology ecosystem.

Salary: Up to SGD 9,000/month
Apply now if you are looking for a mission-critical role in one of Singapore’s most important digital payment infrastructures.