Senior Lead Engineer - Site Reliability Engineering

Senior Lead Engineer, Site Reliability Engineering

Our Team

We are evolving our Reliability Engineering team to move beyond support and operations. As a Senior Engineer in Site Reliability, you will be part of a diverse and inclusive organization that has full ownership of the availability, performance, and scalability of one of the most critical
shared services at LSEG.

We are looking for people with a passion to learn, and who bring a continuous improvement mentality to our team!

Main Responsibilities

• Maintain Service Level Objectives (SLOs) for cloud-hosted systems, continuously measuring and improving availability, latency, and overall system health.

• Design and implement automation for AWS and Azure environments to scale systems sustainably, prevent service issues, and
enable rapid recovery.
• Partner with development teams to improve reliability, observability, and release velocity using cloud-native tools and
guidelines.
• Participate in on-call rotations, incident response, postmortems, and root cause analysis.
Advocate for strong engineering practices for building, deploying, and running scalable, reliable services across AWS and
Azure.
• Enable cloud migration by performing architectural reviews, operational readiness testing, and configuring observability
dashboards (e.g., Datadog integrated with AWS CloudWatch and Azure Monitor).
• Drive continuous learning and development in multi-cloud technologies.

Minimum Qualifications
• Bachelor's degree or equivalent experience in Computer Science or related technical field.
• Proficiency in scripting languages (Shell, Python).
• Experience maintaining Infrastructure as Code (IaC) using Terraform (or AWS CloudFormation, Azure ARM templates).
• Hands-on experience with AWS services (EC2, S3, RDS, IAM, VPC, Lambda) and familiarity with Azure equivalents.
• Knowledge of Docker and Kubernetes (EKS or AKS preferred).
• Familiarity with observability tools like Datadog, AWS CloudWatch, or Azure Monitor.
• Implement and maintain CI/CD pipelines (AWS CodePipeline, Azure DevOps, or similar).
• Incident response and blameless postmortems.
• Proficient in Git workflows.

Preferred Qualifications
• 10-12 years of proven experience.
• Strong understanding of AWS Well-Architected Framework and Azure Architecture Center.
• Experience with cloud security guidelines (IAM, KMS, Secrets Manager).
• Familiarity with cloud-native databases (AWS RDS/DynamoDB, Azure SQL).
• Knowledge of DevOps concepts and modern cloud-native architectures.

Career Stage:

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.

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 purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

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.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

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