Summary
Stephen Choi is a seasoned quant, AI researcher, and former sell-side derivatives trader with over two decades of experience building and managing systematic trading and investment teams across Asia and the US. As Head of Research at Liquibit Capital and co-founder/CEO of IRAI, he blends hands-on AI/LLM product development for crypto markets with practical portfolio management and SFC-compliant fintech delivery. His track record spans launching proprietary OTC derivatives desks, managing global multi-asset systematic funds, and publishing academic work on momentum, covered calls, and conversational factor retrieval. Equally at ease in research and engineering, he has led Gen-AI stacks, authored papers on LLM-ADE and ConFIRM, and translated models into regulated trading/advisory products. Not obvious from titles: he consistently bridges sell-side trading instincts with startup agility, turning complex quant research into deployable financial products.
8 years of coding experience
10 years of employment as a software developer
Bachelor of Arts (B.A.) Mathematics Economics, Bachelor of Arts (B.A.) Mathematics Economics at Northwestern University
Master’s Degree Financial Mathematics, Master’s Degree Financial Mathematics at University of Chicago
English, Korean