Salary: £65,000 - 95,000 per year Requirements: Modern configuration management tools (Ansible, Chef or similar) Terraform Docker containers & orchestration (Kubernetes, OpenShift, Docker Swarm) CI/CD tooling (Jenkins or similar) Monitoring/metrics stack (InfluxDB, Prometheus, Grafana) MQ messaging (RabbitMQ or other AMQP solutions) SQL & relational databases Linux administration & shell scripting Network security fundamentals Cloud hosting (ideally AWS: EC2, RDS, S3, Lambda) Bonus points for experience with Java, Go, Python or similar Knowledge of cross-domain principles & tech Service management experience Hands-on observability implementation Proven ability to reduce downtime with smart reliability metrics Responsibilities: Collaborating with Software Engineers to improve subsystem reliability and performance Partnering with System Administrators to automate toil and cut down alert noise Taking observability to the next level—find issues before they hit the business Supporting development environments to boost speed and quality Researching & evaluating tools to guide key buy-vs-build decisions Deepening your expertise across multiple technical and business domains Expanding your knowledge of diverse tech stacks and platforms Technologies: AWS Lambda Ansible CI/CD Cloud Docker EC2 Grafana Java Jenkins Kubernetes Linux Network OpenShift Prometheus Python RabbitMQ SQL Security Terraform DevOps More: At TwinStream, we tackle high-impact engineering challenges that matter. Our elite team of engineers focuses on mission-critical systems used by the UKs leading government organizations. Were experiencing rapid growth and are seeking a Site Reliability Engineer to take on a dynamic role that offers real ownership, influence, and innovation opportunities. Enjoy a competitive salary up to £95k, an 8% employer pension contribution, private medical healthcare for the entire family, and a flexible working culture. We provide a supportive environment with plenty of learning and development opportunities, 28 days of holiday plus bank holidays, regular team events, and more. Join us in shaping the future of secure, high-performance systems. last updated 10 week of 2026