Job Description

Department: Technical

Reports to: Group Technical Director

Hours: Monday to Friday 09:00 to 17:30 with planned out of hour and on-call

The Linux & Applications Specialist will support, maintain, automate, and improve critical ISP, hosting, and service provider platforms across a fast-paced telecommunications and internet service provider environment.

The role focuses on Linux systems administration, ISP platform support, hosting infrastructure, automation, monitoring, and platform reliability across cloud and on-premise environments. The successful candidate will support core operational systems that underpin broadband, voice, hosting, monitoring, authentication, and customer service delivery platforms.

Working closely with Network Engineering, Infrastructure, Cyber Security, and Service Operations teams, the role will help ensure secure, stable, and scalable service delivery across the business.

Supporting our company values of:

Pace

• Responds rapidly to operational incidents and customer-impacting issues
• Delivers improvements efficiently while maintaining service stability
• Takes ownership and drives tasks through to completion

Excellence

• Maintains high technical, security, and operational standards
• Focuses on reliability, resilience, and service quality
• Produces accurate documentation and well-managed solutions

Together

• Collaborates effectively across Network, Infrastructure, Service Desk, and Engineering teams
• Shares knowledge and supports continuous team improvement
• Builds strong working relationships with customers, suppliers, and colleagues

Key Responsibilities

• Manage and support Linux server infrastructure across ISP and hosting platforms
• Support operational applications including monitoring, authentication, DNS, VoIP, hosting, and management systems
• Maintain and improve platform stability, performance, resilience, and security
• Perform patching, upgrades, vulnerability remediation, and system hardening
• Support automation and scripting for provisioning, monitoring, maintenance, and operational tasks
• Maintain backup, recovery, and disaster recovery processes
• Support virtualisation and hosted infrastructure environments
• Assist with incident response, troubleshooting, root cause analysis, and problem management
• Produce and maintain technical documentation and operational standards
• Support infrastructure modernisation, standardisation, and automation initiatives
• Participate in out-of-hours maintenance and operational escalation where required

Skills & Experience

Essential

• Strong Linux systems administration experience.
• Experience supporting production hosting or ISP infrastructure environments.

Knowledge of:

• Apache / NGINX
• MariaDB / MySQL / Postgres
• DNS
• SMTP / Mail Platforms
• Virtualisation platforms
• Backup and monitoring systems
• Experience with Bash and/or Python scripting

Understanding of networking fundamentals including:

• IP networking & Routing
• Firewalls
• VPNs
• VRFs / VLANs
• Strong troubleshooting and problem-solving skills.
• Understanding of platform security, patch management, and system hardening.

Desirable

• Experience within an ISP, telecoms, MSP, or hosting provider
• Exposure to MikroTik, FRRouting, or network automation
• Experience supporting high-availability service environments
• Building DevOps systems to support infrastructure as code

Knowledge of:

• Proxmox / VMware / Docker
• RADIUS
• VoIP platforms
• Monitoring platforms
• Git and automation tooling

Personal Attributes

• Proactive and technically driven
• Strong ownership and accountability
• Calm and methodical under pressure
• Good communication and documentation skills