Senior Site Reliability Engineer

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

Job summary

TwinStream Limited is seeking a Site Reliability Engineer to design, build and maintain resilient systems. You will automate, monitor, and scale infrastructure across cloud and on‑premise environments, working with cross‑functional teams to improve reliability and performance.

The role is remote initially, with potential on‑site work in Bristol 2–3 days a week in the future, and requires a practical approach to DevOps, IaC (Terraform/Ansible), and CI/CD practices.

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.

Responsibilities

• Designing and maintaining reliable, scalable infrastructure across cloud and on‑prem environments.
• Monitoring system performance and proactively resolving issues.
• Automating processes to improve efficiency using IaC and automation tooling.
• 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 to virtualised deployments.

Skills

SRE/DevOps

Cloud platforms

CI/CD pipelines

Automation

Monitoring

Collaboration

Tools

Terraform

Ansible

CI/CD tooling

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