Technical Lead - Site Reliability Engineering

About the role

We are evolving our Site Reliability Engineering capabilities to strengthen reliability, observability, security, and operational excellence across our Markets and Risk Intelligence division. As a Technical Lead 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. You will work closely with global teams and may occasionally 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.

Responsibilities

• Lead the establishment of SRE foundations for new projects building environments, monitoring, alerting, and ensuring operational readiness from day one.
• Collaborate with Architecture and Engineering teams to embed reliability, scalability, security, and observability into system design.
• 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.
• Lead seamless handovers from project delivery into BAU SRE operations by ensuring documentation, readiness, and strong operational practices.
• 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.

Requirements

• Bachelor’s Degree in Computer Science or related field.
• 10+ years of hands-on technical experience in SRE, Platform Engineering, Infrastructure, or related roles.
• Strong experience with Azure, including services such as AKS, Azure Container Apps, Virtual Machines, virtual networking (VNet), and Azure managed services.
• Hands-on experience with Kubernetes and containerised platforms.
• 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.
• Solid understanding of cloud security principles and experience collaborating with security teams.
• Experience with cloud cost optimisation strategies and tooling.
• Experience integrating AI with observability stacks (Prometheus, Grafana, ELK, OpenTelemetry) for proactive issue detection.

Skills

• 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.

Nice to have

• Experience or working knowledge of AWS.
• 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).

About the company

London Stock Exchange Group (LSEG) is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. We offer a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days, and wellbeing initiatives.