System Administrator

PT ITSEC Asia Tbk; Jakarta Pusat; On-site; IDR 100,000,000 - 180,000,000; Full time

Job summary

PT ITSEC Asia Tbk is seeking an experienced Infrastructure Engineer to own and maintain operating system environments (Linux/Windows) across production platforms in Jakarta. You will develop automation scripts, implement configuration management, and lead root-cause analysis for complex failures to sustain high availability.

The role requires 7+ years of production-grade experience, strong scripting (Python, Bash, PowerShell), and a solid background in virtualization (Proxmox) and containers

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, Software Engineering, or a related technical field (or equivalent practical experience).
• Minimum 7 years of experience managing production-grade systems and infrastructure environments.
• Deep knowledge of OS internals, including memory allocation, storage/filesystems, process management, and networking stacks (Linux/Unix or Windows Server).
• Strong scripting skills in Python, Bash, or PowerShell, alongside experience with configuration management tools (Ansible, SaltStack, Puppet).
• Experience with virtualization platforms (Proxmox) and container orchestration tools (Kubernetes or Docker).
• Experience configuring and maintaining monitoring and logging solutions (Prometheus, Grafana, Loki, or APM tools).
• Practical knowledge of network protocols, access control, system hardening, and patch management.

Responsibilities

• Own, configure, and maintain operating system environments (Linux/Ubuntu/CentOS or Windows Server) to ensure platform stability, performance, and security.
• Develop and maintain automation scripts and configuration management workflows for system provisioning, configuration, and deployments.
• Perform deep-level technical troubleshooting to identify and permanently resolve root causes of complex system and infrastructure failures.
• Establish and enforce system hardening standards, access controls, and automated patching procedures.
• Evaluate, test, and integrate modern infrastructure technologies and tools to improve system performance and reliability.
• Optimize system monitoring, logging, and metrics collection to ensure system health and proactive incident management.
• Collaborate with engineering, product, and platform teams to support infrastructure requirements without compromising system stability.
• Maintain clear technical documentation for infrastructure configurations, procedures, and troubleshooting workflows.

Skills

OS internals

Automation scripting

Analytical thinking

Communication

Independence

Education

Bachelor’s degree in Computer Science / IT / Software Engineering or related field

Tools

Ansible

SaltStack

Puppet

Proxmox

Kubernetes

Docker

Prometheus

Grafana

Job description

Responsibilities

• Own, configure, and maintain operating system environments (Linux/Ubuntu/CentOS or Windows Server) to ensure platform stability, performance, and security.
• Develop and maintain automation scripts and configuration management workflows for system provisioning, configuration, and deployments.
• Perform deep-level technical troubleshooting to identify and permanently resolve root causes of complex system and infrastructure failures.
• Establish and enforce system hardening standards, access controls, and automated patching procedures.
• Evaluate, test, and integrate modern infrastructure technologies and tools to improve system performance and reliability.
• Optimize system monitoring, logging, and metrics collection to ensure system health and proactive incident management.
• Collaborate with engineering, product, and platform teams to support infrastructure requirements without compromising system stability.
• Maintain clear technical documentation for infrastructure configurations, procedures, and troubleshooting workflows.

Requirements

• Bachelor’s degree in Computer Science, Information Technology, Software Engineering, or a related technical field (or equivalent practical experience).
• Minimum 7 years of experience managing production-grade systems and infrastructure environments.
• Operating Systems: Deep knowledge of OS internals, including memory allocation, storage/filesystems, process management, and networking stacks (Linux/Unix or Windows Server).
• Automation & Scripting: Strong scripting skills in Python, Bash, or PowerShell, alongside experience with configuration management tools (such as Ansible, SaltStack, or Puppet).
• Virtualization & Containers: Experience with virtualization platforms (e.g., Proxmox) and container orchestration tools (such as Kubernetes or Docker).
• System Monitoring: Experience configuring and maintaining monitoring and logging solutions (e.g., Prometheus, Grafana, Loki, or APM tools).
• Security & Networking: Practical knowledge of network protocols, access control management, system hardening guidelines, and patch management.
• Strong analytical skills and a methodical approach to diagnosing and resolving complex technical issues.
• Ability to independently manage core infrastructure systems and make sound operational decisions.
• Willingness to objectively evaluate and adopt modern infrastructure technologies based on operational needs.
• Clear written and verbal communication skills to document system architectures and collaborate effectively across teams.