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Millennium hired an ex-Citadel engineer for its “critical link”

Last updated: June 7, 2025 1:41 am
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3 months ago
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Millennium hired an ex-Citadel engineer for its “critical link”
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UI and UX engineering staff in finance seem universally popular at the moment. Banks and electronic trading firms have been growing their teams, and now hedge fund Millennium is in on the act. 

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Michael Walsh has joined Millennium as its head of trading UI, based in Chicago. He spent the last 15 months at Chicago-based prop trading firm Belvedere, where he was an engineering team lead, but he also spent two and a half years as a software engineer at rival hedge fund Citadel.

The bulk of Walsh’s career, however, was at Trading Technologies, a multi-asset trading platform. He spent a decade at the SaaS firm, becoming its VP of trading products. His efforts at Trading Technologies were focused on optimizing performance to “deliver microsecond level price and order traffic with as little memory and cpu as possible.”

Reforming UI has been on the agenda for a little shy of a decade at Millennium. It created MLP Launchpad, its unified UI platform in 2018, and migrated more than 100 applications onto it as of 2022. 

Walsh’s team is already hiring. Millennium has an open listing for a trading UI product manager in New York, paying a salary of up to $250k. The opening described the trading tools team, which works on UI, as “the critical link between trading stakeholders and engineering teams.”

Millennium declined to comment.

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