Senior AI 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. LSEG’s ticker symbol is LSEG.

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:

We are looking for an enthusiastic Senior AI Engineer who is passionate about working with the latest artificial intelligence technologies and techniques. This is a demanding role with a wide range of essential skills - you will be fully engaged each day in the depths of AI engineering.

WHAT YOU'LL BRING:

• Azure architecture and engineering, including landing zones, networking, storage, compute, and Domain Name System (DNS) configuration.

• Azure AI Foundry, including models, agents, deployments, and endpoints. Azure AI Search, including indexes, retrieval-augmented generation (RAG), vector search, and vector databases.

• Azure Cosmos DB, including its use by agents and for storing agent memory. Azure API Management (APIM), particularly the secure exposure and management of large language models (LLMs).

• Azure observability, including Azure Monitor, Application Insights, and Azure Workbooks.

• Langfuse, including designing and conducting evaluations and assessing outcome quality and value relative to token usage and cost. Datadog for logging, observability, and LLM analytics.

• RAG, vector databases, and advanced retrieval techniques

• LiteLLM as an AI and Model Context Protocol (MCP) gateway. MCP gateways and their integration with MCP servers

• Contemporary AI models—including, as of July 2026, Fable 5, GPT-5.6, and GLM-5—and an understanding of their performance, appropriate usage, and behaviour across different agent harnesses.

• Claude Code, Codex, open-source agent harnesses, and GitHub Copilot, including their configuration, telemetry, and policy controls.

• OpenTelemetry (OTel), including telemetry produced by agent harnesses and APIM, and its ingestion into Langfuse.

• Developing experimental agents using Azure AI Foundry Agent Service and Azure AI SDKs. Advanced Langfuse usage, including datasets, experiments, prompt management, custom evaluators, tracing, and cost analysis.

• Experimenting with advanced RAG techniques such as hybrid search, semantic ranking, query rewriting, reranking, and metadata filtering.

Desirable skills and experience:

• Building AI applications with LangChain and LangGraph, including agents, tool calling, memory, checkpoints, and human approval stages.

• Building document-processing workflows with Azure AI Document Intelligence, Azure Storage, Azure Functions, and Azure AI Search. Applying Azure AI Content Safety and other guardrails to prompts, retrieved content, model responses, and tool execution.

• Designing and evaluating multi-agent workflows, including delegation, shared context, permissions, and termination conditions.

• Creating synthetic test data, adversarial test cases, evaluation datasets, and regression tests for AI experiments.

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.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject.

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.