Architecture & Reliability Engineer - London Stock Exchange Group

ROLE SUMMARY:
We are seeking an experienced Lead Site Reliability Engineer to provide technical leadership in designing, building and improving the reliability of our Risk Intelligence technology platforms.
Working at the intersection of Software Engineering, Solution Architecture, Platform Engineering and Site Reliability Engineering, you will help ensure our products and services are designed for reliability, resilience, scalability and operational efficiency from the outset.
This is a senior technical leadership role with a strong emphasis on Reliability by Design, embedding SRE principles early in the software development lifecycle and influencing architectural decisions that improve long-term production stability.
You will work across multiple engineering teams, translating complex architectural and operational challenges into practical engineering solutions, while driving the adoption of modern reliability engineering practices, observability standards and automation.
WHAT YOU'LL BE DOING:
Reliability Architecture & Engineering

• Partner with Software Engineering, Solution Architecture and Platform Engineering teams to assess and improve the reliability, resilience, scalability and operability of technology solutions.
• Provide technical leadership in distributed systems design, service dependencies, failure handling, high availability, disaster recovery and capacity planning.
• Develop and promote reusable reliability engineering patterns, technical standards and engineering best practices across Risk Intelligence platforms.

Production Readiness & Shift-Left SRE

• Embed reliability engineering principles throughout the software development lifecycle, engaging with engineering teams from solution design through production deployment.
• Lead technical Production Readiness Reviews (PRRs), assessing architecture, observability, resilience, recovery capabilities and operational readiness.
• Establish clear reliability requirements and acceptance criteria for new services, major changes and platform migrations.
• Support engineering teams in designing safer deployment, rollback, progressive delivery and automated validation approaches.

Observability, Performance & Resilience

• Drive the adoption of effective observability practices across infrastructure, applications, service dependencies and business-critical transaction flows.
• Work with Engineering and Product teams to establish meaningful Service Level Indicators (SLIs), Service Level Objectives (SLOs) and error-budget practices.
• Assess application performance, capacity, resilience and recovery requirements, recommending improvements based on technical evidence.

Engineering Automation & Continuous Improvement

• Identify opportunities to eliminate repetitive operational activities through software engineering, automation and self-service capabilities.
• Contribute to the development of automated diagnostics, service health checks, deployment validation and operational tooling.
• Explore practical applications of AI-assisted engineering and intelligent automation to improve incident prevention, detection and recovery.
• Partner with Product SRE and Production Operations teams to identify recurring operational issues and address their underlying engineering causes.

Technical Leadership & Collaboration

• Act as a senior technical contributor and trusted engineering partner across SRE, Software Engineering, Architecture and Product teams.
• Lead complex technical discussions, architectural assessments and reliability improvement initiatives.
• Provide technical guidance and mentorship to SRE engineers, encouraging consistent engineering practices and knowledge sharing.
• Contribute to the evolution of SRE engineering standards, technical capabilities and the wider reliability engineering strategy.

WHAT YOU'LL BRING:
Required skills and experience

• Strong experience in software engineering, solution architecture, platform engineering or site reliability engineering, with a track record of delivering complex enterprise technology solutions.
• Solid understanding of distributed systems, service-oriented architecture, microservices, APIs, integration patterns and modern application architectures.
• Strong software development background, with proficiency in at least one programming language such as Java, Python, Go or a comparable language.
• Experience designing or assessing highly available, scalable, fault-tolerant and resilient systems.
• Working knowledge of cloud platforms, preferably AWS, and modern infrastructure and application deployment approaches.
• Understanding of CI/CD practices, infrastructure automation, release engineering and software delivery lifecycles.
• Ability to analyse complex technical problems, challenge existing designs and translate findings into practical engineering improvements.
• Strong communication, stakeholder engagement and technical presentation skills, with the ability to influence engineering decisions across teams.

Desirable Skills & Experience

• Kubernetes, containers, infrastructure as code and cloud-native architectures.
• Practical SRE experience with SLIs, SLOs, error budgets and toil reduction alongside observability tools.
• Chaos testing, disaster recovery, performance engineering or progressive delivery.
• AI-assisted engineering, AIOps or generative AI platforms (e.g., Amazon Bedrock).
• Experience in financial services or other regulated environments.

Career Stage:
Senior Associate
LSEG unlocks the power of markets to create opportunities across the global economy.
Through our connected network of market infrastructure, data and analytics, we help customers access capital, manage risk and make confident decisions.
Our insights bring clarity to complex markets, and our trusted services ensure resilience and stability. With deep expertise and global scale, we partner with customers to drive innovation and shape the future of finance.
Few organisations operate at the scale, complexity and reach of LSEG. Here, you'll work alongside experts, be inspired to deliver your best work and help shape what's next for our business and the global economy.
Guided by our values of Integrity, Partnership, Excellence and Change, we bring together diverse perspectives, encourage fresh thinking, and create an environment where learning never stops.
Join more than 26,000 colleagues across 60 countries, supporting customers in over 170 countries. Alongside flexible ways of working, you'll have access to benefits that support your wellbeing and your future, including 26 weeks' parental leave, healthcare, retirement planning and a wellness allowance. Through the LSEG Foundation and two paid volunteering days each year, you'll also have opportunities to get involved in your local community and support causes that matter to you.
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.
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