Linux Infrastructure Engineer

You'll take ownership of an existing, large-scale Linux estate - cloud servers backed by tens of thousands of bare-metal edge devices powering critical emergency systems - working alongside our current Linux engineering team to keep it performing reliably at scale while meeting strict security standards. Day to day, this means everything you'd expect from a strong Linux engineer - server administration, automation, patching and hardening - but applied across both our cloud servers and an estate of edge devices measured in the tens of thousands rather than the tens. A solid grounding in Linux security and a genuine interest in doing things properly at scale are essential., * Look after an established estate of tens of thousands of bare-metal Linux edge devices, together with the cloud servers behind them, ensuring performance, security and reliability at scale.

• Design, build and maintain core Linux cloud servers and the wider bare-metal edge fleet, identifying and resolving bottlenecks before they become problems.
• Implement and maintain strict security protocols to protect systems and data across the estate.
• Regularly monitor for vulnerabilities, apply patches and conduct security audits.
• Configure and manage firewalls, intrusion detection systems and VPNs.
• Write Bash / Shell scripts and build automation to manage updates, monitoring and backups consistently across thousands of devices.
• Configure and maintain DNS, DHCP and VPNs, and troubleshoot network-related issues.
• Work with MQTT and related technologies to support real-time communication across the edge fleet.
• Help build and maintain CI/CD pipelines (GitHub Actions) for application build, testing and deployment.
• Create and maintain clear documentation for system configurations and procedures, in line with our ISO 27001 and ISO 9001 standards.
• Collaborate with cross-functional teams to enhance system reliability and efficiency.

• Strong, all-round Linux engineering and systems administration, comfortable working across any distribution (our estate runs primarily on Ubuntu)
• A strong security foundation - hardening, patching, vulnerability management and secure-by-design thinking
• Bash / Shell scripting for automation at scale
• Network configuration and security (DNS, DHCP, VPNs, firewalls)
• Managing large-scale edge device fleets - tens of thousands of devices - and the tooling that makes that practical
• Cloud server administration - running core, backend Linux servers on Microsoft Azure
• Infrastructure as Code and automation - hands-on with Ansible and/or Terraform
• Containerisation - Docker / Podman
• MQTT (or similar lightweight messaging) for real-time communication across the edge fleet
• Certificate infrastructure / PKI for device identity and secure communication at scale
• CI/CD and release automation - GitHub Actions for application build, test and deployment (a smaller but growing part of the role), * Minimum 3 years' experience in Linux systems administration / infrastructure engineering, ideally including large or scalable estates.
• Strong all-round Linux knowledge, comfortable working across any distribution.
• A genuine security mindset and solid understanding of Linux hardening and best practice.
• Proficiency in Bash / Shell scripting for automation and task management.
• Strong understanding of networking protocols, services and security practices, including VPNs at scale.
• Relevant certifications are highly desirable - for example LPIC-1/LPIC-2, CompTIA Linux+, RHCSA, Ubuntu/Canonical certifications, or a security qualification such as CompTIA Security+. We'll also support the right person in working towards these.
• Experience with several of the modern fleet toolchain - Infrastructure as Code (Ansible, Terraform), containerisation (Docker / Podman), MQTT and certificate/PKI infrastructure - and the willingness to develop the rest.
• Passing familiarity with PHP and/or Go is a nice to have, but not required.
• Problem-solving - the ability to diagnose and resolve complex system issues efficiently.
• Communication - clear and effective verbal and written communication.
• Adaptability - eagerness to learn and adopt new technologies.
• Teamwork - the ability to collaborate effectively in a fast-paced environment., * Linux: 3 years (required)

Pulled from the full job description

• Annual leave
• Free parking
• Company pension
• Casual dress
• Company events
• On-site parking, * Competitive salary
• Hands-on learning and genuine professional growth, including support towards relevant certifications
• 20 days' annual leave + bank holidays
• Free onsite parking
• The chance to be part of a fast-growing company focused on career development, working on technology that genuinely matters - edge systems that people rely on in emergencies

Audiebant is an innovative technology company providing cutting-edge audio and notification solutions for schools and businesses. Our platform integrates real-time alerts, player management, cloud APIs, and IoT button-triggered events., Join Audiebant and be part of an innovative team shaping the future of real-time notification and audio technology!