Senior Systems Administrator

Salary: £70,000 - 70,000 per year

Requirements:

• Were looking for an experienced Infrastructure Engineer, Systems Administrator, or Site Reliability Engineer with significant commercial experience managing production infrastructure.
• Strong Linux administration, configuration, and troubleshooting skills.
• Experience with cloud platforms such as GCP, AWS, or Azure, and hands-on experience with Kubernetes in production.
• Experience with Terraform or similar Infrastructure as Code technologies.
• Strong networking knowledge, including TCP/IP, DNS, TLS, VPNs, firewalls, and routing.
• Experience managing relational databases and distributed systems, including backup and recovery.
• Scripting and automation experience using Bash and Python or Go.
• Strong understanding of infrastructure security, monitoring, and operational best practices.
• Excellent troubleshooting skills and the ability to take ownership of complex technical issues.
• Experience with GKE and wider GCP services; Cassandra, ScyllaDB, or other distributed database technologies; PCI-DSS, ISO 27001, or SOC 2 environments; GitOps, ArgoCD, or Kustomize; Istio or other service mesh technologies; Cloudflare; Google Workspace administration and Apple device management; disaster recovery; or Prometheus, OpenTelemetry, or cloud monitoring solutions would be advantageous.

Responsibilities:

• Manage, maintain, and optimise cloud infrastructure hosted on Google Cloud Platform (GCP).
• Administer Linux servers, virtual machines, and containerised environments.
• Manage Kubernetes clusters, including Google Kubernetes Engine (GKE).
• Build and maintain infrastructure using Terraform and Infrastructure as Code practices.
• Support production databases and distributed systems, including MySQL, Cassandra, Elasticsearch, Redis, and RabbitMQ.
• Maintain and improve backup, disaster recovery, and business continuity processes.
• Configure and troubleshoot networking infrastructure, including VPNs, DNS, firewalls, load balancers, and cloud networking.
• Implement monitoring, alerting, and incident management processes.
• Manage operating system patching, security hardening, and infrastructure upgrades.
• Support corporate IT infrastructure, including Google Workspace, device management, and endpoint security.
• Contribute to infrastructure security and compliance, including PCI-DSS requirements.
• Identify opportunities to automate processes and modernise legacy infrastructure.

Technologies:

• AWS
• ArgoCD
• Azure
• Bash
• Cloud
• Cassandra
• ElasticSearch
• GCP
• GitOps
• Incident Management
• Istio
• Support
• Kubernetes
• Kustomize
• Linux
• MySQL
• OpenTelemetry
• Prometheus
• Python
• RabbitMQ
• Redis
• Security
• TCP/IP
• Terraform
• WAF

More:

Were recruiting a Senior Systems Administrator for an established technology business specialising in payment infrastructure and transaction processing. The role is based in Fareham, Hampshire, with office-based working during probation and a minimum of three onsite days per week thereafter. Salary is £60,000–£70,000 plus benefits. This is an opportunity to take ownership of complex production environments and work with modern cloud technologies supporting business-critical payment platforms. The recruitment agency is acting as an Employment Agency in relation to this vacancy.

last updated 44 week of 2026