Senior Site Reliability Engineer - Southampton or Sutton

Job Title: Senior Site Reliability Engineer
Location: Hybrid - Southampton or Sutton - 2 days a week in the office
Salary/Rate: Up to £560 inside IR35
Start Date: November 2025
Job Type: 6-month contract

Company Introduction
We are looking for a Senior Site Reliability Engineer with AWS, Linux, Docker, IaC, and Monitoring (Grafana) experience to join our client, a global analytics organisation based in Southampton/Sutton (twice a week)

Required Skills/Experience

• In-depth technical knowledge of Linux, Implementation of Containerisation (Docker), Administration, Scripting in Bash.
• Strong AWS experience - Working with AWS messaging Services (SNF) & Kafka
• Advanced knowledge of at least one IaC tool such as Terraform, Cloudformation, Ansible
• Strong experience with monitoring tools such as Grafana, Elastic, StatusCake, PagerDuty
• Security Engineering pipeline experience
• Containerisation (Docker) on Linux
• Good understanding of at least one high-level programming language, ie Python
• In-depth knowledge of one or more database systems such as Postgres, SQL Server
• Experience in explaining technical issues & updates to non-technical people so they are able to easily understand.
• Experience in designing, building, and maintaining high performance, highly available production hosting environments, preferably using AWS (VPCs, security groups, RDS, S3, EC2, ECS, EKS)
• Understanding of security engineering and security best practices
• Advanced knowledge of configuration management tools, such as Puppet, etc.
• Advanced knowledge of best practices and tooling for Continuous Integration and Continuous Deployment (CI/CD)

Job Responsibilities/Objectives

• Working as part of a cross-functional team to best implement internal applications
• Diagnose complex system performance problems
• Work closely within cross-functional teams to refine system monitoring and reporting
• Identify and implement best practices by collaborating with other SREs and SRE teams
• Understand Infrastructure as a Service (IaaS) and its implementation methods.
• Identify and implement architectural best practices by collaborating with multiple teams and software engineers
• Diagnose complex system problems using dumps, traces, or other diagnostics aids.
• Manage and encourage new ideas from staff to foster improvements and innovation

Desirable Skills/Experience

• Agile Delivery
• An understanding of Vault & Keyless

If you are interested in this opportunity, please apply now with your updated CV in Microsoft Word/PDF format.

Disclaimer

Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies.

Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.