Site Reliability Engineer

Site Reliability Engineer
Hybrid – Bristol (with occasional travel to other sites & possible 24/7 callout when on rota | £80,000 – £110,000 DOE
Join a Team Built on Technical Excellence
At TwinStream, we’re not just technologists—we're mission-driven engineers solving some of the UK government’s most complex cross-domain challenges.
Founded by engineers in 2019, we consolidated decades of experience into a consultancy that delivers cutting-edge, secure, and scalable technical solutions. With teams deployed both on-site and remotely, we continue to grow—driven by demand for our high-trust, high-performance services.
Now, we’re looking for a Site Reliability Engineer (SRE) to join our fast-growing team.
Why this Site Reliability Engineer role?
Our SREs are the quiet heroes behind the scenes—ensuring that our mission-critical systems stay performant, available, secure, and cost-effective. You’ll work across cloud and on-prem environments, shaping infrastructure, delivery pipelines, and monitoring systems while partnering closely with dev and support teams.
This role is ideal for someone passionate about engineering excellence, automation, and reliability at scale.
Why TwinStream?
We believe the best engineering happens in environments that respect life outside of work. Here’s what we offer:

• 8% Employer Pension Contribution
  
• Private Medical (inc. dental + optical) for you and your family
  
• £1,000 Annual Training Budget – your growth, your way
  
• Flexible/Remote Working Culture
  
• EV Salary Sacrifice Scheme
  
• 25 Days Annual Leave + Bank Holidays
  
• Regular Team Socials & Events
  
• Cycle to Work Scheme & Life Assurance
  Key Responsibilities of the Site Reliability Engineer:
  
• Work closely with engineers and sysadmins to increase performance and reduce toil
  
• Advance system observability, monitoring and alerting
  
• Automate, troubleshoot, and proactively resolve issues before they escalate
  
• Improve development environments to meet delivery and quality targets
  
• Research and evaluate tools and platforms to support scale and efficiency
  
• Build deep knowledge across business and technical domains
  What We’re Looking For
  Essentials:
  
• Infrastructure as Code expertise with tools like Terraform
  
• Config management with Ansible, Chef, or similar
  
• Docker/container orchestration (e.g. Kubernetes, OpenShift)
  
• CI/CD experience (e.g. Jenkins)
  
• Monitoring tools like Grafana, Prometheus, or InfluxDB
  
• Event-driven architecture with RabbitMQ or other AMQP tools
  
• Strong Linux, scripting, and networking fundamentals
  
• Experience with AWS (EC2, RDS, S3, Lambda)
  Desirables:
  
• Coding in Java, Go, Python, or similar
  
• Familiarity with cross-domain security principles
  
• Previous work in service management or high-availability environments
  
• Experience building or using reliability metrics
  Security Matters
  Due to the nature of our work, any offer will be subject to passing security screening and eligibility for DV (Developed Vetting) clearance.
  Ready to build what matters?
  If you’re a reliability-obsessed engineer ready to support systems at the heart of UK national interests, we want to hear from you.
  Apply now and engineer impact with TwinStream