Job Specification: Senior Linux System & Network Administrator
Key Responsibilities
• Linux Systems Administration
o Install, configure, and maintain Linux servers (Oracle Linux, Foreman, Ansible,).
o Manage user accounts, permissions, and access controls (FreeIPA,).
o Perform system monitoring, performance tuning, and capacity planning.
o Apply security patches, OS updates, and ensure compliance with company standards.
o Implement backup, restore, and disaster recovery strategies.
• Networking Administration
o Configure and maintain LAN, WAN, VPN, and firewall systems.
o Manage routers, switches, and network monitoring tools.
o Ensure network availability, bandwidth optimization, and low latency.
o Troubleshoot network outages, connectivity issues, and hardware failures.
o Implement and monitor network security policies.
• Security & Monitoring
o Configure and monitor intrusion detection/prevention systems.
o Maintain logs, auditing.
o Apply cybersecurity best practices to both systems and networks.
o Monitor system health using Zabbix.
• Automation & Scripting
o Write and maintain scripts (Bash, Python, or Ansible) for automation and efficiency.
o Deploy and manage configuration management tools (TeamCity, Ansible).
• Collaboration & Support
o Work closely with application, security, and DevOps teams.
o Provide technical support and guidance to internal teams.
o Document processes, configurations, and troubleshooting steps.
Requirements
• Education & Experience
o Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent practical experience).
o 5+ years of proven experience as a Linux System Administrator and/or Network Administrator.
• Technical Skills
o Strong knowledge of Linux operating systems (Oracle Linux).
o Solid understanding of TCP/IP, DNS, DHCP, routing, switching and firewalls
o Ability to use networking tools (Wireshark, Netcat)
o Hands-on Experience with AWS Azure DevOps environments
o Hands-on experience with VPNs, VLANs, load balancers, and proxies.
o Experience with containerization (Docker/Kubernetes is a plus).
o Familiarity with monitoring/logging tools (Zabbix, OpenSearch).
o Proficiency in shell scripting (Bash) and at least one programming/scripting language (Python preferred).
o Knowledge of security hardening practices.
o Ability to Manage Postgres Database server, Patroni PostgreSQL cluster is a plus.
o Ability to Manage Corosync Cluster Engine, Pacemaker Cluster manager is a plus.
o Ability to Manage Rabbit MQ cluster is a plus.
• Soft Skills
o Strong troubleshooting and analytical skills.
o Ability to prioritise and multi-task.
o Ability to work independently and under pressure in a fast-paced environment.
o Excellent communication and documentation skills.
o Team player with a proactive attitude.
• How to Apply
Apply directly on LinkedIn or send your resume and a brief cover letter explaining your interest in SpectrAxe and how your experience aligns with our requirements to with the subject line "Senior Linux System & Network Administrator - London".
SpectrAxe is registered with the CFTC as a Swap Execution Facility (SEF) and is committed to building a diverse team. We strongly encourage applications from candidates of all backgrounds.