JL
Jongmin Lim represented Australia at the 2016 International Mathematical Olympiad, winning a silver medal (rank 114, 23 points). He attended Killara High School and graduated from the University of Sydney with a Bachelor of Science in Advanced Mathematics (2017-2020). According to the LinkedIn index he then worked at IMC Trading, a global market maker, as a Trader on Japan index futures (2021-2024) and then Team Lead (2024-2025), and the index lists him as a Lecturer with the Australian Maths Trust. He maintains a public Math Olympiad lecture-notes site and the index headline reads 'Retired trader'. Recent third-party LinkedIn listing pages, however, surface an 'Optiver' employer and an 'Un-Retired trader' headline - an aggregator-only, unverified signal that conflicts with the cached index and is not treated as a confirmed role.
- Quant employment verification: CONFIRMED for IMC Trading - the LinkedIn index records a Trader role (2021-2024) and a Team Lead role (2024-2025) on Japan index futures at IMC Trading, and IMC is a genuine market maker. UNRESOLVED whether any Optiver role is real. Identity is supported by the IMO 2016 silver medal and the Killara High School / University of Sydney education chain.2026
- IMO 2016 result verified on the official IMO page: Jongmin Lim represented Australia and won a silver medal (S), rank 114, 81.2%, 23 points - the primary-source identity anchor for this profile.Jul 2016
- Employer conflict / unverified: recent LinkedIn listing pages render this profile with an 'Optiver' employer and the headline 'Un-Retired trader', while the cached LinkedIn index instead lists IMC Trading (until 2025) and the headline 'Retired trader'. The Optiver signal is aggregator-only with no accessible primary profile text and is recorded as unresolved, not as a confirmed role.2026
- Identity cross-lock: the Australian Scene 2016 document attributes a published solution to 'Jongmin Lim, year 12, Killara High', matching the LinkedIn education entry (Killara High School 2012-2016) and the IMO 2016 participation.2016
- IMC Trading (imc.com) is a self-described global market maker ('one of the world's leading market makers... trades on more than 100 venues'), so the indexed IMC Trading roles classify as quantitative trading/market-making - employer classification for the Quant employment verification note.
- Optiver (optiver.com) is a research-driven proprietary trading firm and market maker, so it too would classify as a quant trading employer IF the role were confirmed - but it is not.
- Runs a public 'Math Olympiad Lecture Notes' site (jjlim789.github.io/jongmin_lecture_notes) with PDFs authored by him ('s-lim', 'j-lim', 'i-lim'), last updated 2026-06-26 - indicating ongoing olympiad teaching activity into 2026, consistent with the Australian Maths Trust lecturer/coaching role.Jun 26, 2026
My lecture notes are listed here https://jjlim789.github.io/jongmin_lecture_notes/
Japan Index Futures
Japan Index Futures
Competition record
Australia · IMO