Site Reliability Engineer

Site Reliability Engineer
Hybrid (Near Hereford) | £80,000 - £110,000 DOE + Clearance
Join a team that builds technology where it matters most.
In 2019, TwinStream was founded by a group of engineers with deep experience solving complex, cross-domain problems within government organisations. Today, we continue that mission — delivering cutting-edge solutions with a focus on technical excellence, reliability, and exceptional service.
We work in hybrid teams: some of us work closely with clients onsite, while others operate remotely. What unites us is a commitment to innovation, collaboration, and a job well done.
The Role: Site Reliability Engineer
We’re growing — and so is demand for the secure, high-performance systems we deliver to government clients. As a Site Reliability Engineer (SRE), you’ll play a key role in ensuring that these critical services are always available, resilient, and cost-effective.
You’ll work closely with development and support teams to evolve infrastructure, optimise delivery pipelines, and proactively detect and resolve reliability risks — whether in the cloud or on-premise.
This is more than just operations. It’s a chance to shape the future of secure, high-impact systems at scale.
Why You’ll Love Working Here

• We believe in supporting our people — personally and professionally. Here's what we offer:
  
• 8% Pension Contribution
  
• Private Medical (incl. Dental & Optical)
  
• £1,000 Annual Training Budget
  
• 25 Days Holiday + Bank Holidays
  
• Flexible & Hybrid Working
  
• EV Leasing via Salary Sacrifice
  
• Team Events & Celebrations
  
• Life Assurance & Cycle-to-Work Scheme
  Key Responsibilities of the Site Reliability Engineer:
  
• Partner with developers to improve performance and reliability across systems
  
• Automate toil and reduce unnecessary alerts with smart tooling
  
• Evolve observability so we can prevent issues before they become incidents
  
• Improve CI/CD pipelines and support development teams in delivering quality faster
  
• Explore new technologies, tools, and services that improve how we build
  
• Drive cost and performance improvements in real systems used by government clients
  Your Skills & Experience:
  We’re looking for engineers with strong foundational knowledge and a passion for infrastructure and automation:
  Essential:
  
• Proficiency with Ansible (Chef or similar is a plus)
  
• Experience with Terraform and modern IaC practices
  
• Hands-on with Docker and orchestration tools (Kubernetes, OpenShift, or Docker Swarm)
  
• CI/CD experience (Jenkins or equivalent)
  
• Monitoring/observability tools: Grafana, Prometheus, or InfluxDB
  
• Event-driven messaging: RabbitMQ or similar
  
• Strong Linux skills, scripting, and understanding of network security protocols
  
• Experience with AWS: EC2, S3, RDS, Lambda
  Security Requirements
  Due to the sensitive nature of our work, candidates must be eligible for Developed Vetting (DV) clearance. All offers are subject to security screening.
  Ready to Engineer Systems That Matter?
  If you’re a proactive SRE looking to work on challenging, high-impact projects in a flexible and supportive environment — we’d love to hear from you. Apply now and let’s build the future together