Junghun Ju

Junghun Ju is a quantitative researcher at Presto, a Singapore-based algorithmic crypto trading and market-making firm, a role he took up in 2025. He represented the Republic of Korea at the International Mathematical Olympiad in 2015 (40/42, gold, individual rank 3) and 2016 (perfect 42/42, tied individual rank 1, gold), as a student at Seoul Science High School. He then read mathematical sciences at Seoul National University (Bachelor's, 2017-2022) and, by 2023, was a researcher at Pymatics, a Korean AI-based investment firm trading equities and bonds. From 2017 he spent three years as a Polymath mentor. His public footprint is otherwise sparse: no verified GitHub, X, or personal site.

Notes5

• Quant employment verification: CONFIRMED. Two quantitative-finance roles: (1) researcher at Pymatics (파이매틱스), a Korean AI-based investment firm, doing financial-data analysis to trade equities and bonds (Donga Science, Sep 2023 - the same article names him IMO 2016 full-score gold medalist, anchoring the employer to the Olympiad identity); (2) Quantitative Researcher at Presto (prestolabs.io, Singapore), an algorithmic crypto trading and market-making firm founded 2014, from 2025 onward. Presto's own site confirms it is an algorithmic trading firm. Identity supported by consistent Seoul National University mathematics education and Seoul Science High School across sources. The Pymatics role rests on a published news source; the Presto role rests on LinkedIn-derived index enrichment (index-only).
• Represented the Republic of Korea at IMO 2015 (40/42, individual rank 3, gold) and IMO 2016 (perfect 42/42, tied individual rank 1, gold) while a student at Seoul Science High School - the 2016 Korean team scored three perfect papers, the country's first full-score golds in 21 years.
• Career timeline: Seoul Science High School (2014-2017) -> Seoul National University, Bachelor's in mathematical sciences / 수리과학부 (2017-2022) -> researcher at Pymatics (AI investment firm, active by Sep 2023) -> Quantitative Researcher at Presto, Singapore (2025-). This places a transition from a Korean AI-investment shop into a Singapore algorithmic crypto-trading firm between 2023 and 2025.
• Pymatics is a Korean AI-based investment company (사업자 등록, financial/investment sector, founded 2014, software development category) - the employer classification is a genuine quantitative-investment firm rather than a namesake, corroborated by the company-registry listing alongside the news article.
• Served as a Polymath (폴리매스) mentor for three years from 2017, mentoring younger math students - the earliest post-Olympiad public activity, running alongside his undergraduate studies.