Senior Site Reliability Engineer

LSEG; Nottingham; On-site; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Healthcare

Retirement planning

Paid volunteering days

Wellbeing initiatives

Job summary

LSEG is seeking a Senior Site Reliability Engineer in Nottingham to lead reliability initiatives across platforms. The role requires 5+ years in SRE or related fields and expertise in AWS (or Azure), Linux systems, and observability tools like Datadog. You will influence design decisions and collaborate with global teams on operational excellence. Benefits include healthcare and retirement planning, reflecting our commitment to diversity and equal opportunities.

Qualifications

• 5+ years of hands-on technical experience in SRE, Platform Engineering, Infrastructure, or related roles.
• Strong understanding of cloud security principles and experience collaborating with security teams.
• Proven experience designing and operating observability platforms.

Responsibilities

• Lead the establishment of SRE foundations for new projects.
• Define and implement observability standards and tooling.
• Continuously drive reliability improvements across environments.

Skills

SRE Technical Experience

AWS (or Azure) Experience

Linux Systems Administration

Observability Platforms Design

Datadog

Cloud Security Principles

Education

Bachelor’s Degree in Computer Science or related field

Tools

Terraform

CloudFormation

Job description

We are evolving our Site Reliability Engineering capabilities to strengthen reliability, observability, security, and operational excellence across our Risk Intelligence division.

Role Overview

As a Senior SRE, you will be a senior hands‑on technical person helping shape the foundations of reliability across both new and existing platforms. You will collaborate with Architecture, Engineering, Security, and Platform teams to ensure reliability is built into systems from day one. While this is not a people‑management role, you will work closely with global teams and may be called upon for major incidents or critical issues. This position requires a highly proactive, hard‑working expert with strong leadership presence and ownership of platform reliability outcomes.

Key Responsibilities

• Lead the establishment of SRE foundations for new projects, building environments, monitoring, alerting, and ensuring operational readiness from day one.
• Define, implement, and champion observability standards, tooling, and guidelines across metrics, logs, traces, and SLIs/SLOs.
• Design and evolve monitoring and alerting solutions that improve visibility, reduce toil, and strengthen system health.
• Continuously drive reliability improvements across our environments through incident reduction, performance tuning, and building resilient patterns.
• Partner with Security teams to ensure our platforms meet compliance, security, and risk‑management expectations.
• Influence architectural and design decisions through data‑driven cloud cost optimization and efficiency initiatives.
• Be a technical leader and mentor supporting engineers, shaping engineering standards, and fostering a culture of learning and development.

Education & Qualifications

Education: Bachelor’s Degree or equivalent experience in Computer Science, Engineering, or a related field.

Required Skills And Experience

• 5+ years of hands‑on technical experience in SRE, Platform Engineering, Infrastructure, or related roles.
• Strong experience with AWS (or Azure), including services such as EKS, ECS, EC2, networking, IAM, and managed services.
• Solid understanding of cloud security principles and experience collaborating with security teams.
• Strong background in Linux systems administration.
• Proven experience designing and operating observability platforms, including monitoring, logging, and alerting.
• Hands‑on experience with Datadog for metrics, logs, APM, and alerting.
• Strong understanding of SRE principles, including SLOs, error budgets, incident management, and reliability engineering.
• Experience working closely with architecture and engineering teams on system design and delivery.
• Experience with cloud cost optimization strategies and tooling.

Good To Have Skills

• Experience supporting multi‑cloud or hybrid environments.
• Exposure to Infrastructure as Code (e.g., Terraform, CloudFormation).
• Experience in large-scale, complex, or regulated environments.
• Knowledge of vector databases and RAG architectures for building internal SRE knowledge assistants.
• Knowledge of Generative AI and LLM platforms (e.g., Claude, Amazon Bedrock).

Person Specification

• Strong technical authority with the ability to influence design and operational decisions.
• Highly collaborative, comfortable working across architecture, engineering, security, and operations teams.
• Calm and methodical under pressure, especially during incidents and critical issues.
• Pragmatic problem‑solver who balances reliability, security, cost, and delivery speed.
• Clear communicator, able to explain complex technical concepts to diverse audiences.

Career Stage

Senior Associate

Company Information

LSEG is a leading global financial markets infrastructure and data provider. We are committed to sustainability and are proud to partner with our customers to help them meet their sustainability objectives. We value diversity and are an equal opportunities employer. Our benefits include healthcare, retirement planning, paid volunteering days, and wellbeing initiatives.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.