Johnny Ho

Cofounder and Chief Strategy Officer of Perplexity AI, leading product; previously a high-frequency quantitative trader at Tower Research Capital and an engineer at Quora. Harvard graduate (mathematics and computer science) and former competitive programmer (IOI 2011/2012/2013; ICPC World Finals 2016 gold).

Notes9

• Quant employment verification: CONFIRMED. Johnny Ho worked at Tower Research Capital, a proprietary high-frequency algorithmic trading firm (Wikipedia: 'Automated trading firm', financial services industry). LinkedIn enrichment lists Quantitative Trader Aug 2017 - Aug 2022 ('High frequency trading models and strategy') and Trading Intern 2016, both Greater New York City Area. Identity corroborated by the AAEOY profile, the ScaleUp:AI speaker bio, Crunchbase, and his own X bio 'Former high frequency trader'. Actual employment, not a student program or insight day.Sep 17, 2026
• Tower Research Capital tenure (Quantitative Trader Aug 2017 - Aug 2022) ends exactly when Perplexity begins (Aug 2022), indicating he left the trading firm to co-found Perplexity.Aug 1, 2022
• X account @randomjohnnyh bio: 'Cofounder, CSO @perplexity_ai. Former high frequency trader, competitive programmer. Think fast, build faster. New York, NY.' — first-person corroboration of both current and trading roles.Sep 17, 2026
• Cofounded Perplexity in August 2022 with Aravind Srinivas, Andy Konwinski and Denis Yarats; Perplexity reached a $20B valuation in 2025 and Forbes lists his net worth at $2.1B.Mar 10, 2026
• IOI record (USA): 2011 Gold (rank 17), 2012 Gold (rank 1, perfect score), 2013 Silver (rank 37).Jul 1, 2013
• AAEOY honored him with 'Most Promising Engineer of the Year'; its profile states he holds a degree in math and computer science from Harvard and is based in San Francisco.May 1, 2026
• ICPC World Finals: 2015 rank 19; 2016 Gold medal (rank 3) with the Harvard team (Calvin Deng, Johnny Ho, Scott Wu), also North America Champion.May 19, 2016
• Harvard ICPC team page lists Johnny Ho as A.B. '18, consistent with his Harvard attendance ending in 2017/2018.May 1, 2016
• Before professional work he was an Engineer at Quora (2013-2014, Ranking and backend systems, SF Bay Area) and a Research Intern at Harvard Medical School (2012); both predate his Harvard degree enrollment (2014), indicating high-school-era roles.Jan 1, 2014