Senior Linux Engineer

Overview

We are seeking an experienced Senior Linux Engineer to join our infrastructure and network engineering team, responsible for deploying, implementing, and supporting secure Linux-based platforms within enterprise and data centre environments. The ideal candidate will have a minimum of 8 years of hands-on experience with Linux operating systems and a strong background in network security, firewall technologies, and infrastructure deployment.

This role requires expertise in NixOS, with experience in RHEL, GUIX, or other immutable operating systems. The successful candidate will also have strong knowledge of Linux networking, security zoning, stateful firewalls, and packet filtering technologies such as nftables. Experience with Cilium and Zeek is highly desirable, while exposure to Suricata will be considered an advantage.

Responsibilities

• Deploy, configure, and support enterprise Linux servers across production and non-production environments.
• Implement and manage Linux operating systems, including NixOS, RHEL, GUIX, and other immutable OS platforms.
• Deploy and configure Linux-based networking and security services.
• Implement Linux firewall solutions using nftables and stateful firewall technologies.
• Configure Linux networking, including Layer 2 networking, routing, VLANs, and security zoning.
• Support deployment and integration of enterprise firewall platforms, including Cisco, Fortinet, Palo Alto, and Check Point.
• Implement and troubleshoot Linux security controls, host hardening, and network segmentation.
• Configure and support Cilium for Kubernetes networking and security (where applicable).
• Deploy and maintain Suricata IDS/IPS and Zeek network monitoring solutions (preferred).
• Perform Linux system upgrades, patching, migrations, and implementation activities.
• Troubleshoot operating system, networking, firewall, and security-related issues.
• Collaborate with Network, Security, Cloud, and Infrastructure teams during project delivery.
• Develop and maintain technical documentation, implementation guides, and operational procedures.
• Participate in change management activities and support implementation during maintenance windows.
• Ensure Linux environments comply with customer security policies and operational standards.
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Requirements

Mandatory Skills & Experience

• Minimum 8 years of hands-on Linux administration and engineering experience.
• Strong experience with:
  • NixOS
  • Red Hat Enterprise Linux (RHEL)
  • GUIX or other immutable Linux operating systems
• Strong deployment and implementation experience within enterprise Linux environments.
• Experience implementing Linux networking and security solutions.
• Strong knowledge of:
  • Linux Networking
  • Layer 2 Networking
  • TCP/IP
  • VLANs
  • Security Zoning
  • Stateful Firewalls
• Hands-on experience with nftables.
• Experience integrating Linux environments with enterprise firewall platforms, including:
  • Cisco Firewalls
  • Fortinet FortiGate
  • Palo Alto Networks
  • Check Point
• Strong troubleshooting and root cause analysis skills.
• Experience working in enterprise and data centre environments.
• Familiarity with ITIL processes and change management.

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Preferred Skills

• Experience with Cilium for cloud-native networking and security.
• Experience deploying or administering Suricata IDS/IPS.
• Experience using Zeek for network traffic analysis and security monitoring.
• Knowledge of container platforms such as Kubernetes and Docker.
• Experience with Linux automation and configuration management tools (Ansible, Puppet, SaltStack).
• Scripting experience using:
  • Bash
  • Python
  • Shell Scripting
• Knowledge of SELinux and Linux security hardening.
• Exposure to Infrastructure as Code (IaC) and DevOps practices.
• Experience with cloud platforms (AWS, Azure, GCP).

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Preferred Certifications

• Red Hat Certified Engineer (RHCE)
• Red Hat Certified System Administrator (RHCSA)
• Linux Foundation Certified System Administrator (LFCS)
• Linux Foundation Certified Engineer (LFCE)
• Kubernetes Administrator (CKA) (Desirable)
• ITIL Foundation

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Key Competencies

• Strong Linux troubleshooting and problem-solving skills.
• Excellent understanding of Linux security architecture.
• Strong analytical and root cause analysis abilities.
• Excellent communication and stakeholder management skills.
• Ability to work independently and within multidisciplinary project teams.
• Strong documentation and technical reporting skills.
• Customer-focused with the ability to deliver high-quality implementation projects.
• Ability to manage multiple deployment activities in a fast-paced environment.