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Longtian Ji possesses extensive experience in systematic equity trading and electronic trading within prominent financial institutions. Currently at Citadel Securities since October 2021, Longtian Ji focuses on cash equities and listed derivatives systematic trading as well as systematic internaliser (SI) market making. Prior to this role, a directorial position was held at UBS from March 2017 to October 2021, specializing in cash equities electronic trading, execution algorithms, smart order routing, and transaction cost analysis, utilizing technologies such as Python and Kdb+. Earlier experience includes serving as an analyst and developer at BNP Paribas Corporate and Institutional Banking from September 2014 to March 2017, where Longtian Ji was involved in electronic market-making for European government bonds and interest rate swaps through high-performance Java programming. Longtian Ji holds a Master’s Degree in Computer Science from Télécom Paris, obtained from 2011 to 2013.