Platform Linux Engineer

The NETS Group is a leading payments services group, enabling digital payments for merchants, consumers and banks across the entire payments value chain. The Group operates Singapore’s national debit scheme enabling customers of DBS Bank/POSB, HSBC, Maybank, OCBC Bank, Standard Chartered Bank and UOB to make payments using their ATM cards or mobile devices at more than 130,000 acceptance points in the country as well as online payments.

Position Summary:

We are seeking a skilled Linux Engineer to design, implement, and support enterprise Linux-based infrastructure across data center environments. The role focuses on RHEL/Linux system administration, automation, performance tuning, and platform reliability while supporting mission-critical systems. The ideal candidate will have strong hands-on experience in Linux platforms, infrastructure automation, and enterprise operations, with the ability to operate in a fast-paced, production-critical environment.

Key Responsibilities:

Linux System Administration:
Install, Configure, Harden, Patch, and Maintain Linux systems (primarily RHEL-based distributions)
Perform OS tuning, performance optimization, and capacity planning
Ensure system security compliance (CIS benchmarks, patching, vulnerability remediation)

Infrastructure Operations:
Manage Linux systems across development, testing, and production environments
Provide Level 3 support for Linux-related incidents and issues
Support high availability and disaster recovery configurations

Automation & DevOps:
Develop and maintain automation using Ansible, Bash, and Python
Automate provisioning, patching, and configuration management workflows
Working knowledge of BigFix for endpoint management, patch deployment, software distribution and compliance reporting.
Continuously improving system efficiency through infrastructure-as-code practices

System Monitoring & Reliability:
Monitor system health, logs, and performance using enterprise monitoring tools
Troubleshoot system bottlenecks, kernel issues, and application dependencies
Ensure high system availability and uptime
Working knowledge of Zabbix for infrastructure monitoring, alert management, and performance monitoring.

Hardware & Platform Support:
Support physical server infrastructure including installation and maintenance
Coordinate with vendors and internal teams for hardware-related issues

Documentation & Compliance:
Maintain documentation of system configurations, procedures, and runbooks
Ensure compliance with internal policies, security standards, and audit requirements 

Requirements:
Degree in computer science/Information Technology
Minimum 5+ years of experience in IT Infrastructure Engineer role supporting critical system
Experienced in developing Infrastructure Automation using Ansible and shell scripting.
Strong hands-on expertise in RHEL / Linux (LVM, Networking, Kernel tuning)
Experience with configuration management tools (Ansible preferred)
Proficiency in shell scripting (Bash) and familiarity with Python
Experience working in large-scale production environments
Familiarity with containers (Docker/Kubernetes) is a plus
Understanding of security hardening and compliance standards
Red Hat certification (RHCSA/RHCE) is highly desirable
Ability to provide 24x7 support and handle standby/on-call support whenever needed.
Strong working knowledge of the banking environment. 
Experience with MAS TRM Guidelines and PCI-DSS security compliance requirements will be an added advantage.

Soft Skills:
Strong problem-solving skills and the ability to troubleshoot complex issues.
Excellent communication and collaboration skills.
Ability to work independently and as part of a team.
Detail-oriented with strong documentation skills.
Self-motivated and possess strong analytical skills, sharp and meticulous.
Strong interpersonal skills and good time management skills.
ITIL certification is an added advantage

Network for Electronic Transfers (Singapore) Pte Ltd.