Location
Paternoster Square, London

Hours
Full Time

Salary
Negotiable

About the Role
At LSEG, we build technology that helps people make informed decisions in global financial markets. We are seeking a Principal Cloud Site Reliability Engineer (SRE) with strong cloud platform experience to join us in evolving the reliability, scalability, and operational health of our LSEG Workspace platform. Workspace is a core product used by financial professionals worldwide for real-time data, analytics, research, and productivity. We design and operate this platform with care, balancing performance, resilience, security, and ease of use at scale.

In this role, you will strengthen how our cloud-native services are designed, operated, and supported across AWS and Azure. You will contribute hands-on engineering skills, share technical guidance, and help shape long-term platform approaches in a collaborative, learning-oriented environment. This role combines technical depth, practical delivery, and the opportunity to positively influence how we build and run reliable systems.

Key Responsibilities:
- Design and operate Workspace platform services that are resilient, scalable, and well-understood.
- Contribute to cloud infrastructure and application reliability across AWS and Azure, focusing on availability, performance, and sustainable cost practices.
- Apply Site Reliability Engineering principles including developing and refining SLIs, SLOs, and error budgets, and using incidents as opportunities for shared learning.
- Provide input into distributed systems design, container platforms such as EKS, cloud networking, storage, and security.
- Investigate and resolve complex service issues while improving observability practices for early detection and root-cause analysis.
- Automate infrastructure, delivery pipelines, and operational processes supporting CI/CD workflows using GitLab and infrastructure as code tools like Terraform.
- Embed security and compliance into engineering practices, ensuring alignment with governance, vulnerability management, and regulatory requirements.
- Collaborate across engineering and product teams, mentoring others and promoting knowledge sharing and reusable platform patterns.

Join us and be part of a team that values innovation, quality, and continuous improvement. LSEG is a leading global financial markets infrastructure and data provider committed to driving financial stability, empowering economies, and enabling sustainable growth. We foster a diverse and inclusive culture where you can bring your true self to work and contribute to meaningful impact.

Experience
Substantial experience in cloud engineering, site reliability engineering, or DevOps at a senior or principal level with a hands-on approach to building and supporting production systems. Strong experience working with AWS and/or Azure and operating Kubernetes-based platforms such as EKS. Solid Linux foundation. Familiarity with SRE concepts, observability practices, CI/CD tooling (such as GitLab), and infrastructure-as-code solutions like Terraform. Understanding of cloud-native networking and high-availability design. Experience working in Agile or Scrum-based teams.

About you
You enjoy working collaboratively, communicating clearly, and learning alongside others in a continuously evolving technical environment. You are curious, thoughtful, and motivated to solve complex problems while sharing knowledge and mentoring less experienced engineers. You value automation, reliability, security, and sustainable practices in cloud platform engineering.

Qualifications
Relevant professional experience in cloud and site reliability engineering roles is essential. Formal qualifications are not specified but a strong technical background and proven track record in cloud-native environments are expected.