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

RAPSYS TECHNOLOGIES PTE LTD; Singapore; On-site; SGD 67,000 - 100,000; Full time

Job summary

RAPSYS TECHNOLOGIES PTE LTD in Singapore is seeking a System Engineer to manage Unix/Linux servers and support infrastructure. You will ensure high availability, perform patching, monitoring, and automation while driving reliability and security.

Ideal candidates have 3–5 years of hands-on Unix/Linux experience, shell scripting proficiency, and familiarity with Nagios/Zabbix and automation tools. Strong teamwork and communication are valued.

Qualifications

• 3-5 years of hands-on Unix/Linux system administration.
• Strong knowledge of RHEL/CentOS/Ubuntu and shell scripting.
• Experience with monitoring and vulnerability management.
• Good communication and teamwork skills.

Responsibilities

• Administer and manage Unix/Linux servers including backups and SLA
• Ensure high availability and performance of platforms
• Troubleshoot infrastructure issues and resolve them promptly
• Monitor performance and optimize using standard tools
• Patch and manage vulnerabilities to maintain security
• Develop shell scripts to automate tasks
• Document configurations and troubleshooting steps
• Collaborate with team and stakeholders on infrastructure initiatives
• Support DR planning and exercises

Skills

Unix/Linux admin

Shell scripting

Troubleshooting

Team collaboration

Education

Bachelor's degree in computer science / IT

Tools

Nagios

Zabbix

Ansible

Puppet

Chef

Docker

Kubernetes basics

Git

AWS

Azure

GCP

Job description

Job Description

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.

• 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

Role: System Engineer - Unix/Linux

Work Location: Bedok

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)