Site Reliability Engineer

Site Reliability Engineer (Contract – Outside IR35) Hybrid – Hereford (with occasional site visits) Day Rate: £500–£600

Build, Optimise, and Secure the Systems That Power the UK’s Most Critical Infrastructure

In 2019, a team of engineers solving complex cross-domain challenges inside government organisations came together to form TwinStream — a business built on technical excellence, innovation, and exceptional service.

Today, we deliver cutting-edge cross-domain and cloud infrastructure solutions to some of the most high-profile government programmes in the country.

Now we’re looking for a Site Reliability Engineer (SRE) to join us on a contract basis — someone ready to own reliability, drive automation, and keep our systems performing flawlessly.

The Site Reliability Engineer Role:

As a Site Reliability Engineer at TwinStream, you’ll be instrumental in ensuring the availability, performance, and resilience of our secure, high-impact services.

You’ll work with development and support teams to evolve infrastructure, streamline delivery pipelines, and strengthen system observability — ensuring performance bottlenecks and reliability risks are resolved before they ever reach production.

Expect a technically rich environment, diverse challenges, and the opportunity to make a measurable difference.

Key Responsibilities of the Site Reliability Engineer:

Partner with Software Engineers to enhance reliability and performance across complex systems

Collaborate with SysAdmins to automate toil and eliminate manual intervention

Build smarter monitoring, logging, and observability pipelines to detect and resolve issues early

Support and improve development environments to hit delivery and quality goals

Research new tools, services, and architectures to drive scalability and resilience

Expand your expertise across both cloud and on-prem environments

What You’ll Bring:

Proven experience with Terraform and modern configuration tools (Ansible, Chef, etc.)

Skilled with Docker and Kubernetes/OpenShift/Docker Swarm

Hands-on experience building and maintaining CI/CD pipelines (e.g. Jenkins)

Deep understanding of monitoring & observability tools (Grafana, Prometheus, InfluxDB)

Solid grounding in Linux, network security, SQL, and AWS (EC2, S3, RDS, Lambda)

Comfortable with MQ messaging (RabbitMQ or similar)

Bonus points for:

Experience with Azure environments

Strong coding ability in Python, Java, or Go

Knowledge of cross-domain systems or service management frameworks

Proven application of observability and uptime metrics to reduce downtime

The Offer:

Contract position outside IR35

£500–£600 per day (DOE)

Hybrid working from Hereford with occasional travel to other sites

Possible 24/7 on-call rota (with premium compensation)

Work on secure, high-impact projects that make a real difference

Collaborate with some of the UK’s best engineers in an agile, forward-thinking environment

Security Clearance:

Due to the nature of our projects, candidates must be eligible for DV Clearance.

Ready to Deliver Reliability That Matters?

If you’re an experienced SRE who thrives on solving complex infrastructure challenges, driving automation, and delivering secure, high-performance systems — we want to hear from you.

Apply now and join TwinStream — where your engineering skill keeps critical systems running, reliably.