London Stock Exchange

Role

UI Design Lead

Programme

HALO Trading Platform

Deliverables

DS Governance & Library design

Worked on LSEG's HALO trading platform — acting as Library Guardian for the central design system serving 70+ designers across the trading platform group.

Impact

Library Guardian for 70+ designers across the trading platform

Managed the DS as the single source of truth — gating contributions, resolving conflicts and protecting consistency at scale.

Rebuilt and optimised the Figma component library end-to-end

Led the Sketch-to-Figma migration, modernising the structure and unlocking faster, safer iteration for every team.

Owned DS governance, contribution and training across the programme

Set up the contribution flow, ran central governance ceremonies and led training to raise design–code parity.

Consulted on the DS portal, documentation and ecosystem

Shaped how the system was structured, surfaced and adopted across the wider product organisation.

Next case study

Sainsbury's

William Paul · LSEG

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