Lead ML Engineer

Location: Greater London

## Lead ML Engineer Apply locations:
G
-London-5 Canada Square time type:
Full time posted on:
Posted Todayjob requisition :
R0120979

Corporate Engineering AI (CE AI) Team The Corporate Engineering AI team is the central enablement and platform delivery function for LSEG’s internal agentic AI ecosystem. The team’s mission is to scale safe, high‐quality AI capabilities across the enterprise by providing shared platforms, patterns, governance, and delivery support.

CE AI owns and operates core AI platforms including LSEG AI Assist, the Question Answering Service (QAS), and the Internal MCP Gateway. Rather than delivering individual business use cases end‐to‐end, the team enables product engineering groups across LSEG to expose knowledge, data, and actions to AI agents in a consistent, governed, and repeatable way.

The team operates a Central MCP Delivery model: building critical MCP tools and services “for” product teams where required, while simultaneously defining standards, patterns, and platform capabilities that allow teams to progressively move towards self‐service contribution.

LSEG AI Assist / Internal MCP Programme of Work This programme delivers an LSEG‐owned, production‐grade agentic AI platform with MCP as its extensibility layer.

The scope of work includes:
Building and operating LSEG AI Assist, an in‐house agentic experience capable of reasoning, planning, and tool‐calling.
Operating QAS, the enterprise RAG and search layer used to ground agent responses in approved data sources.
Delivering a production Internal MCP Gateway providing discovery, security, policy enforcement, observability, and lifecycle management for MCP tools and Skills.
Designing and building MCP servers and Skills that expose internal and vendor systems safely to agents.
Establishing evaluation, quality control, and governance mechanisms so MCP tools and Skills can be promoted through PTB/PTO and operated with confidence  programme follows a “build for” model today, with a strong emphasis on defining the future product and platform experience, patterns, and contribution pathways that will enable federated scale over time.

ML Engineers – Responsibilities & Skills Responsibilities    Design and build MCP servers and tools that expose enterprise systems and workflows to AI agents.
Implement Skills that orchestrate tools, data, and reasoning into repeatable, governed workflows.
Contribute to the LSEG AI Assist agentic harness, including planning, tool‐calling, and orchestration logic.
Build secure API wrappers where backend systems lack suitable authentication or entitlement models.
Work closely with product teams in a “build for” capacity, transferring knowledge and establishing reusable patterns.
Shape the developer experience for MCP and Skills, including templates, contribution guidance, and standards.
Collaborate with Quality Engineers and SREs to ensure solutions meet quality, governance, and operational readiness expectations.

Skills    Strong Python development experience.
Hands‐on experience with LLM and agent frameworks and agentic reasoning patterns.
Practical understanding of Model Context Protocol (MCP), including server and tool patterns.
FastAPI and REST API design and implementation experience.

Experience with prompt engineering and RAG‐based architectures.
Containerisation and Kubernetes‐based deployment experience.
Ability to work across platform, product, and governance boundaries in an enterprise environment.
** Career Stage:
** Manager
* * 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…