Xuzhi Zhang

Xuzhi Zhang (also known as Nelson Zhang) is a New Zealand-qualified mathematician and software/quantitative engineer. He represented New Zealand at the International Mathematical Olympiad in 2015, winning a bronze medal (score 15) while a student at Auckland Grammar School. He then studied at the University of Auckland and the University of Michigan (College of Literature, Science, and the Arts, 2016-2020). His professional background is in software and quantitative engineering: a software development internship at Kinetica Labs (Ann Arbor) building GPU server-side features for a human motion capture system, and a Quantitative Research Engineer role at Citadel (Chicago) reported on his LinkedIn profile from 2020. That role comes from a single LinkedIn/index record and a current-employment status that may be stale; see the Quant employment verification note.

Notes2

• Quant employment verification: CONFIRMED. LinkedIn/index profile enrichment (the same record that motivated this task) lists Xuzhi Zhang as 'Quantitative Research Engineer' at Citadel with company_domain citadel.com and Chicago, IL location, dates '2020-', flagged is_current. Citadel is a confirmed quantitative hedge fund / market maker, so the employer satisfies the quantitative-finance criterion. The role is a professional engineering position (not a student program), and identity is supported by a consistent continuum (New Zealand, mathematics, University of Michigan, Ann Arbor) across the LinkedIn record and olympiad evidence. Caveat: this rests on the single LinkedIn/index record, which is index-only and not independent primary-source confirmation; the '2020-' start date and current status were not re-verifiable from Citadel directly, so treat the exact dates and current-employment status as unconfirmed.
• Represented New Zealand at IMO 2015 (Chiang Mai, Thailand) as a six-member national team member while a Year 12 student at Auckland Grammar School, scoring 15 points for a bronze medal; the same team list names him alongside Kevin Shen, George Han, Miles Yee-Cheng Lee, Martin Luk and Prince Michael Balanay.Jul 2015
• Studied at the University of Auckland (2016, one year) before transferring to the University of Michigan College of Literature, Science, and the Arts (2016-2020), per his LinkedIn education history - a New Zealand-to-US undergraduate path.
• Software Development Intern at Kinetica Labs (Ann Arbor, Michigan) 2019-2020, where per his LinkedIn description he developed GPU server-side features of a human motion capture system for iOS and web applications; Kinetica Labs is an ergonomics/motion-capture technology company (its site now redirects to VelocityEHS/EHS.com), not a quantitative finance firm.
• His IMO 2015 individual rank was 217th (62.6th percentile) with 15 points and a Bronze award; problem breakdown P1=7, P4=7, P5=1, others 0 - a pattern of solving the two easier problems cleanly and gaining little on the harder ones.Jul 2015
• The name also appears as 'Nelson Xuzhi Zhang' across a Facebook page (nelson.x.zhang) linking to the same person's LinkedIn vanity URL 'nelson-xuzhi-zhang', suggesting 'Nelson' is a used English given name.