Lead ML Engineer – Enterprise AI Platform & Governance

London Stock Exchange Group; Greater London; On-site; GBP 120,000 - 160,000; Full time

Job summary

London Stock Exchange Group (LSEG) is seeking a Manager-level ML Engineer for its Corporate Engineering AI program. You will design MCP servers and tools that expose enterprise systems to AI agents, and implement Skills that orchestrate tools, data, and reasoning into governed workflows.

You will also contribute to the LSEG AI Assist harness, work with product teams in a build-for capacity, and help establish reusable developer patterns across the platform.

Qualifications

• 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.

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

Python development

LLM frameworks

MCP understanding

FastAPI/REST

Prompt engineering

Kubernetes deployment

Enterprise collaboration

Tools

FastAPI

REST API

Kubernetes

Containerisation

Job description

London Stock Exchange Group (LSEG) is seeking a Manager-level ML Engineer for its Corporate Engineering AI program. You will design MCP servers and tools that expose enterprise systems to AI agents, and implement Skills that orchestrate tools, data, and reasoning into governed workflows.

You will also contribute to the LSEG AI Assist harness, work with product teams in a build-for capacity, and help establish reusable developer patterns across the platform.