Principal Platform Engineer

ABOUT US: LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years.

Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity. LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific.

Our People: People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape how we think, how we do things and how we help our people fulfil their potential. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference. Our workplace generates an enriching and rewarding experience for our people and customers alike.

Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential. We know that real personal growth cannot be achieved by simply climbing a career ladder – which is why we encourage and enable a wealth of avenues and interesting opportunities for everyone to broaden and deepen their skills and expertise. As a global organisation spanning 70 countries and one rooted in a culture of growth, opportunity, diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with meaningful careers!

Role Summary: You will work on a modern, cloud-native data platform built on Microsoft Azure, and you’ll have substantial input into how the platform evolves over time. The environment supports large-scale, business-critical workloads and is developed for both real-time and batch processing. The platform makes extensive use of Azure Databricks, Apache Spark, and Delta Lake to support high-throughput data pipelines. Kafka and Azure Event Hubs are used to implement reliable, event-driven architectures, with schema management and stream processing forming core parts of the system. Datasets are stored and served primarily using ADLS Gen2 and Delta tables, with additional technologies such as Azure Data Explorer, Cosmos DB, or Synapse used where they are the right fit.

Engineers work closely with SQL, Python, and Scala to model data, optimise query performance, and support high-QPS analytical use cases. The platform places a strong emphasis on reliability, observability, and secure delivery. Teams use Datadog and Azure Monitor, follow Open Telemetry standards, and handle environments using Git-based workflows and Infrastructure as Code. Automated testing and well-defined release strategies are central to how changes are built and shipped.

What You’ll Bring: You will bring 5–10+ years of experience building and operating highly scalable systems in production, ideally within data-intensive or analytics-heavy environments. You’ve worked hands-on with Azure and have experience operating Databricks platforms supporting both streaming and batch workloads. You will have practical experience working with Kafka or Azure Event Hubs, including designing partitions, managing consumer groups, and understanding delivery semantics. You’re confident working with SQL, have experience with data modelling, and know how to diagnose and improve query performance on large datasets. A proven understanding of distributed systems fundamentals, such as fault tolerance, stateful processing, and system resilience. You’ve worked with event-driven architectures and have supported systems that handle high request volumes and low-latency analytical workloads. You’re comfortable working in at least one data-focused programming language, such as Python or Scala, and you bring a good sense of ownership. You enjoy influencing technical direction, mentoring other specialists, and helping teams converge on shared standards and guidelines.

Desirable: While not required, experience in some of the following areas would be advantageous. This could include working with Delta Live Tables, Unity Catalog, or broader Lakehouse governance approaches, or exposure to additional data and streaming technologies such as Flink, Azure Data Explorer (Kusto), or Cosmos DB. Experience crafting serving layers, stream-out patterns, or feature stores for analytics or machine learning is also valuable. Familiarity with SRE practices, such as defining SLOs and handling error budgets in data-intensive systems, is a plus.

Information for Applicants: 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. We are an equal opportunities employer and do not discriminate on basis of race, religion, colour, national origin, gender, sexual orientation, gender identity, or any other basis protected under applicable law. We can accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs where reasonable. We are committed to sustainability and offer tailored benefits and wellbeing initiatives.