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About the Role

We are looking for an enthusiastic Senior AI Engineer passionate about working with the latest artificial intelligence technologies and techniques. This is a demanding role requiring a wide range of essential skills, fully engaging you daily in the depths of AI engineering.

Responsibilities

• 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.
• 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.

Requirements

• 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.

Skills

• Azure architecture and engineering
• Azure AI Foundry
• Azure AI Search
• Azure Cosmos DB
• Azure API Management (APIM)
• Azure observability
• Langfuse
• Datadog
• RAG
• Vector databases
• LiteLLM
• MCP gateways
• Contemporary AI models
• Claude Code
• Codex
• Open-source agent harnesses
• GitHub Copilot
• OpenTelemetry (OTel)
• Azure AI SDKs
• LangChain
• LangGraph
• Azure AI Document Intelligence
• Azure Storage
• Azure Functions
• Azure AI Content Safety

Location

• London

Work Type

• Full-time

Experience Level

• Senior
• Manager

Benefits

• Healthcare
• Retirement planning
• Paid volunteering days
• Wellbeing initiatives

About the Company

• LSEG (London Stock Exchange Group) is 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.
• We enable businesses and economies globally to fund innovation, manage risk, and create jobs.
• We have contributed to supporting financial stability and growth globally for over 300 years.
• We provide trusted financial market infrastructure services through an open-access model, offering flexibility, stability, and trust.
• LSEG is headquartered in the United Kingdom, with significant operations in 70 countries.
• We employ 25,000 people globally.
• Our culture connects people, creates opportunity, and delivers excellence.
• We embrace diversity and seek individuals with unique backgrounds and perspectives.
• We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions.
• Our workplace generates an enriching and rewarding experience for our people and customers.
• Our vision is to build an inclusive culture where everyone feels encouraged to fulfil their potential.
• We encourage and enable a wealth of avenues and interesting opportunities for personal growth.
• LSEG is a place where everyone can grow, develop, and fulfil their potential with meaningful careers.
• Join us and be part of a team that values innovation, quality, and continuous improvement.
• 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 guide our decision-making.
• We are a dynamic organisation of 25,000 people across 65 countries.
• We value individuality and enable you to bring your true self to work.
• We encourage new ideas in a collaborative and creative culture.
• We are committed to sustainability across our global business.
• We partner with our customers to help them meet their sustainability objectives.
• Our charity, the LSEG Foundation, provides charitable grants to community groups.
• Colleagues can get involved through fundraising and volunteering.

Equal Opportunity

• We are proud to be an equal opportunities employer.
• 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.