System Administrator - Linux & Kubernetes

Areti Group | B Corp™; United Kingdom; Hybrid; GBP 40,000 - 60,000; Full time

Job summary

A growing technology firm in the United Kingdom is seeking a System Administrator with expertise in Kubernetes, Helm, and Linux. In this hands-on role, you will take ownership of systems, work directly with customers, and ensure secure and scalable solutions are delivered. The ideal candidate has strong Linux administration skills, experience with Kubernetes, and a collaborative attitude. This position offers hybrid working flexibility.

Qualifications

• 5+ years of experience in Linux administration.
• Proficiency in using Helm charts for deployments.
• Solid understanding of DHCP, subnetting, routing, and firewalls.
• Good documentation and communication skills; customer-facing experience preferred.
• Comfortable troubleshooting and problem-solving in complex environments.

Responsibilities

• Administer and support Linux systems across all environments.
• Manage Kubernetes clusters including deployment and scaling.
• Utilize Helm charts for consistent deployments.
• Configure networking for secure access to services.
• Collaborate with customers to ensure technical needs are met.
• Produce and share high-quality technical documentation.
• Support automation and CI/CD practices.

Skills

Linux administration

Kubernetes

Helm charts

Networking concepts

Documentation skills

Troubleshooting skills

Tools

Rancher

Istio Service Mesh

Job description

Overview

Bristol HQ (Hybrid Working – 2 days on-site, 3 days remote).

We’re seeking a talented System Administrator with strong skills in Kubernetes, Helm, and Linux to join a growing technology team. This is a hands-on role where you’ll take ownership of systems, work directly with customers, and ensure secure, reliable, and scalable solutions are delivered.

You’ll be part of a collaborative environment where you’ll play a key role in both day-to-day operations and longer-term projects, working across infrastructure, automation, and containerised environments.

Responsibilities

• Administer, configure, and support Linux systems across development and production environments.


• Manage and maintain Kubernetes clusters (deployment, scaling, monitoring, and troubleshooting).


• Use Helm charts to drive consistency and reliability in deployments.


• Work with Rancher for cluster management and configuration.


• Configure Ingress and networking for secure, reliable public access to services.


• Collaborate directly with customers and internal stakeholders, ensuring technical requirements are met and solutions are well-documented.


• Produce high-quality technical documentation and share knowledge across the team.


• Support automation and CI/CD practices to improve efficiency.

Skills & Experience

• Strong commercial experience with Linux administration (5+ years).


• Proficiency with Helm charts for deployments.


• Solid understanding of networking concepts (DHCP, subnetting, routing, firewalls).


• Good documentation and communication skills, with customer-facing experience.


• Comfortable troubleshooting and problem-solving in complex environments.


• Exposure to Rancher and/or Istio Service Mesh is highly desirable.

Why Join?

• Opportunity to take ownership of modern, containerised environments.


• Work closely with customers as well as internal teams, delivering tangible business impact.


• A collaborative culture that values innovation and professional growth.

If you’re a System Administrator with strong Kubernetes, Helm, and Linux expertise, and you’re excited about working directly with customers in a fast-paced environment, we’d love to hear from you.

We’re on a mission to put people and the planet before profit, leaving the world in a better place than we found it.