Senior Site Reliability Engineer: Cloud & Automation

LSEG (London Stock Exchange Group); Creve Coeur (MO); On-site; USD 120,000 - 180,000; Full time

Job summary

London Stock Exchange Group (LSEG) in Creve Coeur, MO, seeks a Senior Site Reliability Engineer to own uptime, performance, and scalability of critical shared services. You will join a diverse team driving reliability beyond traditional operations and continuously improve systems.

You will design automation for AWS and Azure, implement IaC, maintain SLOs, participate in on‑call rotations, and collaborate with development teams to enhance observability using Datadog, CloudWatch, and Azure Monitor.

Qualifications

• Bachelor's degree or equivalent in CS or related technical field.
• Proficiency in Shell and Python scripting.
• Experience with IaC using Terraform or AWS CloudFormation/Azure ARM templates.
• Hands-on with AWS services and familiarity with Azure equivalents.
• Knowledge of Docker and Kubernetes.
• Familiarity with observability tools (Datadog, CloudWatch, Azure Monitor).
• CI/CD pipelines experience (CodePipeline, Azure DevOps or similar).
• Incident response and blameless postmortems.
• Git workflows proficiency.

Responsibilities

• Maintain SLOs for cloud-hosted systems and improve availability and latency.
• Design and implement automation for AWS and Azure environments.
• Collaborate with development teams to improve reliability and release velocity.
• Participate in on-call rotations, incident response, postmortems, and root cause analysis.
• Advocate for best engineering practices for scalable, reliable services across AWS/Azure.
• Enable cloud migration with architectural reviews and observability dashboards.
• Foster continuous learning in multi-cloud technologies.

Skills

Shell scripting

Python scripting

Git workflows

CI/CD pipelines

Infrastructure as Code

Cloud architectures

Observability concepts

Education

Bachelor's degree in Computer Science or related technical field

Tools

Terraform

AWS CloudFormation

Azure ARM templates

Docker

Kubernetes

Datadog

AWS CloudWatch

Azure Monitor

Job description

London Stock Exchange Group (LSEG) in Creve Coeur, MO, seeks a Senior Site Reliability Engineer to own uptime, performance, and scalability of critical shared services. You will join a diverse team driving reliability beyond traditional operations and continuously improve systems.

You will design automation for AWS and Azure, implement IaC, maintain SLOs, participate in on‑call rotations, and collaborate with development teams to enhance observability using Datadog, CloudWatch, and Azure Monitor.