Senior Site Reliability Engineer

TwinStream; West of England; Hybrid; GBP 65,000 - 90,000; Full time

Job summary

TwinStream is seeking a Site Reliability Engineer to design, build and maintain resilient systems that support critical operations. This remote-first role may require onsite work in Bristol 2–3 days a week after clearance.

You will collaborate with cross-functional teams, implement infrastructure as code, manage cloud platforms, and refine monitoring, CI/CD, and automation practices to improve performance and reliability.

Qualifications

• Experience in Site Reliability Engineering, DevOps, or similar roles.
• Strong knowledge of cloud platforms (AWS, Azure, or GCP).
• Experience with infrastructure as code and configuration management tools (Terraform, Ansible).
• Familiarity with CI/CD pipelines and automation practices.
• Understanding of monitoring, logging, and alerting systems.
• A collaborative mindset and a passion for problem-solving.

Responsibilities

• Designing and maintaining reliable, scalable infrastructure.
• Monitoring system performance and proactively resolving issues.
• Automating processes using tools such as Ansible to improve efficiency and consistency.
• Collaborating with engineers and stakeholders across the business.
• Supporting continuous improvement of systems, tools, and practices.
• Operating across the full infrastructure stack, from bare metal systems through to virtualised deployments and the applications running within them.

Skills

SRE/DevOps

Cloud platforms

Terraform

Ansible

CI/CD

Monitoring & Logging

Collaborative mindset

Tools

Terraform

Ansible

Job description

Location: The role is fully remote initially, but we may put you through DV clearance and, once cleared, ask you to work onsite in Bristol 2–3 days a week at some point in the future.

Security Clearance: Eligible for SC and/or DV Clearance

The Role

As a Site Reliability Engineer, you’ll play a key role in designing, building, and maintaining resilient systems that support critical operations. You’ll work closely with cross-functional teams to ensure our platforms are scalable, secure, and reliable.

This is a hands-on role where you’ll have the opportunity to influence technical direction, improve system performance, and contribute to meaningful projects.

What You’ll Be Doing

• Designing and maintaining reliable, scalable physical and virtual infrastructure
• Monitoring system performance and proactively resolving issues
• Automating processes using tools such as Ansible to improve efficiency and consistency
• Collaborating with engineers and stakeholders across the business
• Supporting continuous improvement of systems, tools, and practices
• Operating across the full infrastructure stack, from bare metal systems through to virtualised deployments and the applications running within them.

What We’re Looking For

We recognise that no one ticks every box. If your experience aligns with most of the below, we’d love to hear from you:

• Experience in Site Reliability Engineering, DevOps, or similar roles
• Strong knowledge of cloud platforms (e.g. AWS, Azure, or GCP)
• Experience with infrastructure as code and configuration management tools (e.g. Terraform, Ansible)
• Familiarity with CI/CD pipelines and automation practices
• Understanding of monitoring, logging, and alerting systems
• A collaborative mindset and a passion for problem-solving