Unix/Linux Administrator- Ansible, Puppet, Chef,containerization,Cloud

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

Job summary

RAPSYS TECHNOLOGIES PTE. LTD. is seeking an experienced Unix/Linux System Engineer in Singapore to own and optimize Unix/Linux environments. You will manage servers, implement automation, and ensure security and reliability across production systems.

The ideal candidate has strong scripting, monitoring, and troubleshooting skills, with exposure to DR planning and cross-team collaboration. This role is on-site in Bedok, Singapore.

Qualifications

• 3-5 years of hands-on Unix/Linux system administration.
• Strong knowledge of Red Hat/CentOS/Ubuntu families.
• Proficient in shell scripting (Bash/Korn).
• Experience with monitoring, patching, and vulnerability management.
• Bachelor's degree in CS/IT or related field.

Responsibilities

• Administer and manage Unix/Linux servers with SLA compliance.
• Ensure high availability and performance of platforms.
• Troubleshoot infrastructure issues promptly.
• Perform monitoring, analysis, and optimization.
• Automate tasks with shell scripts; document configurations.
• Collaborate with team and mentor juniors.
• Support DR planning and testing.
• Adopt best practices and security standards.

Skills

Unix/Linux

Shell scripting

Networking basics

Monitoring tools

Troubleshooting

Security practices

Education

Bachelor's degree

Tools

Nagios

Zabbix

Ansible

Docker

Kubernetes (basics)

Job description

Role: System Engineer - Unix/Linux

Work Location: Bedok

We're looking for a detail-oriented and collaborative Engineer, Unix/Linux System to join our growing infrastructure team in Singapore. In this role, you'll take ownership of managing, maintaining, and supporting our Unix/Linux systems while ensuring optimal performance, reliability, and security. You'll work alongside experienced professionals in a supportive environment where innovation and continuous improvement are valued. The ideal candidate will be analytical, organized, and resilient-ready to tackle complex technical challenges while contributing to our organization's infrastructure goals.

Job Description

• Administer and manage Unix/Linux servers (RHEL, CentOS, Ubuntu) including operational tasks, backup procedures, and SLA compliance
• Ensure high availability and performance of Unix/Linux platforms supporting critical business functions
• Troubleshoot and resolve infrastructure issues impacting system operations in a timely and efficient manner
• Perform system monitoring, performance analysis, and optimization using industry-standard tools
• Execute patching, updates, and vulnerability management to maintain system security and stability
• Develop and maintain shell scripts (Bash, Korn) to automate routine tasks and improve operational efficiency
• Design and implement infrastructure solutions following best practices and organizational standards
• Document system configurations, procedures, and troubleshooting processes for knowledge sharing
• Collaborate with team members, stakeholders, and project management to support infrastructure initiatives
• Participate in testing and implementation of new technologies and services
• Provide technical support and mentoring to junior team members as appropriate
• Suggest process improvements based on emerging technologies, best practices, and changing business requirements
• Support disaster recovery planning and exercises to ensure business continuity

Qualifications

Required Qualifications

• 3-5 years of hands-on experience in Unix/Linux system administration
• Strong knowledge of Linux distributions (RHEL, CentOS, Ubuntu)
• Proficiency in shell scripting (Bash, Korn shell)
• Solid understanding of file systems, LVM, and RAID configurations
• Experience with system monitoring and alerting tools (Nagios, Zabbix, or similar)
• Working knowledge of networking concepts (TCP/IP, DNS, NFS, SSH)
• Experience with patching and vulnerability management processes
• Strong troubleshooting and problem-solving skills
• Bachelor's degree in computer science, information technology, or related field
• Excellent communication and interpersonal skills
• Ability to work effectively under pressure and meet deadlines

Preferred Qualifications

• Experience with infrastructure automation tools (Ansible, Puppet, or Chef)
• Familiarity with containerization technologies (Docker, Kubernetes basics)
• Cloud platform experience (AWS, Azure, or GCP)
• Knowledge of version control systems (Git)
• Experience with performance tuning and system optimization
• Proactive, detail-oriented mindset with a commitment to continuous learning
• Relevant Unix/Linux certifications (RHCSA, LPIC, or equivalent)