All medalists.
IMO & IOI, including honourable mentions.
JWJiawei WuSingaporeIMO2005 · 2006Huawei Singapore研究工程师Indexed profileJGJiaxuan GaoChinaIOI2019Competition recordGold medalJYJia YiChinaIMO2020Competition recordGold medal
Jiayin KangChinaIMO2005Competition recordGold medalAutumn profileJLJiayu LiuChinaIMO2022Competition recordGold medalJJJie Jun AngSingaporeIMO2010 · 2011Competition recordSilver medal · Gold medalIndexed profileJMJieMing MaoChinaIOI2009GoogleSenior Staff Research ScientistIndexed profileJYJih-Chiang YeoTaiwanIMO1998MediaTekMobile IC Digital Circuit Design/Integration Technical ManagerIndexed profileJLJihoo LeeRepublic of KoreaIMO2023Competition recordSilver medalIndexed profileJHJi Hoon RyooRepublic of KoreaIOI2008The State University of New York, Korea (SUNY Korea)Associate ProfessorIndexed profileJYJihoon YoonRepublic of KoreaIOI2012Competition recordBronze medalJPJihyon PakDemocratic People's Republic of KoreaIMO2013Competition recordGold medalJHJi Hyon PakDemocratic People's Republic of KoreaIMO2014Competition recordSilver medalJLJi LuoChinaIOI2001Hariri Institute for Computing, Boston UniversityPostdoctoral ResearcherIndexed profileJKJimin KimRepublic of KoreaIMO2019 · 2020 · 2021Competition recordGold medal · Silver medalJLJim Lok MaHong KongIMO1990Competition recordHonourable mentionJAJimmy AstupilloPeruIMO1997Competition recordHonourable mentionJCJimmy ChuiCanadaIMO1997 · 1998 · 1999Competition recordHonourable mention · Bronze medalJEJimmy Espinoza PalaciosPeruIMO2014 · 2015Competition recordBronze medal · Silver medalJMJimmy MårdellSwedenIOI1997SpotifyStaff EngineerIndexed profileJSJimsher SkhirtladzeGeorgiaIOI2012 · 2013GoogleIndexed profileJJJinbi JinNetherlandsIMO2005 · 2006DSW ZorgverzekeraarSoftware DeveloperIndexed profileJBJingcheng BianNew ZealandIMO2007 · 2008Competition recordHonourable mentionJHJingdan HuaDenmarkIMO2018 · 2019 · 2020Competition recordBronze medal · Honourable mentionJHJing Hong SiewSingaporeIOI2025HTX (Home Team Science & Technology Agency)Indexed profileJLJingran LinLuxembourgIMO2007 · 2008 · 2009BloombergNetwork Reliability Software EngineerIndexed profileJCJingwen ChenChinaIMO2012Competition recordGold medalJXJing XuChinaIOI1999 · 2000Competition recordSilver medalJLJingxun LiangChinaIMO2020Competition recordGold medalJKJingyi Kenneth TaySingaporeIMO2003 · 2005Singapore Armed ForcesArmour Infantry SignallerIndexed profileJ(Jinhao (Hunter) XuCanadaIMO2015Competition recordBronze medalJHJin Ho KimRepublic of KoreaIOI2000 · 2001NEXON KOREAGame ProgrammerIndexed profileJCJin-Min ChungRepublic of KoreaIMO1989Samsung ElectronicsExecutive Vice PresidentIndexed profileJLJinmin LiChinaIMO2020Competition recordGold medalJAJinpeng AnChinaIMO1997Peking UniversityFaculty memberIndexed profileJSJin Song KimDemocratic People's Republic of KoreaIMO2008Competition recordSilver medalJSJin Suk ParkRepublic of KoreaIOI1992Competition recordBronze medalJTJin Tae KimRepublic of KoreaIMO1994Seoul National UniversityAssociate Professor of anesthesiology and pain medicineIndexed profileJUJin Ui JangDemocratic People's Republic of KoreaIMO2026Competition recordBronze medalJWJin Woo ShinRepublic of KoreaIMO1995Competition recordSilver medalJWJinze WuChinaIMO2017Stanford UniversityPHD CandidateIndexed profileJZJin ZouChinaIMO1997Competition recordGold medalJFJiong FengChinaIMO1993Competition recordGold medalJOJi Oon LeeRepublic of KoreaIMO1997Competition recordSilver medalJHJippe HoogeveenNetherlandsIMO2018 · 2019 · 2020Competition recordBronze medal · Gold medalJAJirawat AnunrojwongThailandIMO2012Competition recordGold medalIndexed profileJBJirayu BurapacheepThailandIOI2018Competition recordBronze medalJLJirayu LuewetwanitThailandIOI2012 · 2013Competition recordBronze medal · Silver medal
Jirayus JinapongThailandIMO2018 · 2019Number One Mathematics and Physics Tutoring CentreMathematics TutorAutumn profile
Jiří EichlerCzech RepublicIOI2012Scanlock International s.r.o.Full Stack EngineerAutumn profileJHJiří HájekCzech RepublicIOI1995Competition recordGold medalJKJiří KalvodaCzech RepublicIOI2019 · 2020 · 2021IXPERTAIT ConsultantIndexed profile
Jiří KalvodaCzech RepublicIMO2021Charles UniversityStudent, Department of Applied Mathematics, Charles UniversityAutumn profileJMJiří MoudrýCzechoslovakiaIMO1959Competition recordHonourable mentionJNJiří NavrátilCzechoslovakiaIMO1975 · 1976 · 1977Competition recordBronze medal · Silver medalJŘJiří ŘihákCzech RepublicIMO2007Kindwise (FlowerChecker)Co-Founder, Researcher, CTOIndexed profileJSJiří SgallCzechoslovakiaIMO1981 · 1982 · 1983Competition recordBronze medal · Silver medal · Gold medalJSJiří SoučekCzechoslovakiaIMO1960Competition recordSilver medalJSJiří SvobodaCzech RepublicIOI2000Competition recordBronze medalJTJiří TůmaCzechoslovakiaIMO1970VSB - Technical University of OstravaProfessorIndexed profile
Jiayin KangChinaIMO2005Competition recordGold medalAutumn profileJLJiayu LiuChinaIMO2022Competition recordGold medalJJJie Jun AngSingaporeIMO2010 · 2011Competition recordSilver medal · Gold medalIndexed profileJMJieMing MaoChinaIOI2009GoogleSenior Staff Research ScientistIndexed profileJYJih-Chiang YeoTaiwanIMO1998MediaTekMobile IC Digital Circuit Design/Integration Technical ManagerIndexed profileJLJihoo LeeRepublic of KoreaIMO2023Competition recordSilver medalIndexed profileJHJi Hoon RyooRepublic of KoreaIOI2008The State University of New York, Korea (SUNY Korea)Associate ProfessorIndexed profileJYJihoon YoonRepublic of KoreaIOI2012Competition recordBronze medalJPJihyon PakDemocratic People's Republic of KoreaIMO2013Competition recordGold medalJHJi Hyon PakDemocratic People's Republic of KoreaIMO2014Competition recordSilver medalJLJi LuoChinaIOI2001Hariri Institute for Computing, Boston UniversityPostdoctoral ResearcherIndexed profileJKJimin KimRepublic of KoreaIMO2019 · 2020 · 2021Competition recordGold medal · Silver medalJLJim Lok MaHong KongIMO1990Competition recordHonourable mentionJAJimmy AstupilloPeruIMO1997Competition recordHonourable mentionJCJimmy ChuiCanadaIMO1997 · 1998 · 1999Competition recordHonourable mention · Bronze medalJEJimmy Espinoza PalaciosPeruIMO2014 · 2015Competition recordBronze medal · Silver medalJMJimmy MårdellSwedenIOI1997SpotifyStaff EngineerIndexed profileJSJimsher SkhirtladzeGeorgiaIOI2012 · 2013GoogleIndexed profileJJJinbi JinNetherlandsIMO2005 · 2006DSW ZorgverzekeraarSoftware DeveloperIndexed profileJBJingcheng BianNew ZealandIMO2007 · 2008Competition recordHonourable mentionJHJingdan HuaDenmarkIMO2018 · 2019 · 2020Competition recordBronze medal · Honourable mentionJHJing Hong SiewSingaporeIOI2025HTX (Home Team Science & Technology Agency)Indexed profileJLJingran LinLuxembourgIMO2007 · 2008 · 2009BloombergNetwork Reliability Software EngineerIndexed profileJCJingwen ChenChinaIMO2012Competition recordGold medalJXJing XuChinaIOI1999 · 2000Competition recordSilver medalJLJingxun LiangChinaIMO2020Competition recordGold medalJKJingyi Kenneth TaySingaporeIMO2003 · 2005Singapore Armed ForcesArmour Infantry SignallerIndexed profileJ(Jinhao (Hunter) XuCanadaIMO2015Competition recordBronze medalJHJin Ho KimRepublic of KoreaIOI2000 · 2001NEXON KOREAGame ProgrammerIndexed profileJCJin-Min ChungRepublic of KoreaIMO1989Samsung ElectronicsExecutive Vice PresidentIndexed profileJLJinmin LiChinaIMO2020Competition recordGold medalJAJinpeng AnChinaIMO1997Peking UniversityFaculty memberIndexed profileJSJin Song KimDemocratic People's Republic of KoreaIMO2008Competition recordSilver medalJSJin Suk ParkRepublic of KoreaIOI1992Competition recordBronze medalJTJin Tae KimRepublic of KoreaIMO1994Seoul National UniversityAssociate Professor of anesthesiology and pain medicineIndexed profileJUJin Ui JangDemocratic People's Republic of KoreaIMO2026Competition recordBronze medalJWJin Woo ShinRepublic of KoreaIMO1995Competition recordSilver medalJWJinze WuChinaIMO2017Stanford UniversityPHD CandidateIndexed profileJZJin ZouChinaIMO1997Competition recordGold medalJFJiong FengChinaIMO1993Competition recordGold medalJOJi Oon LeeRepublic of KoreaIMO1997Competition recordSilver medalJHJippe HoogeveenNetherlandsIMO2018 · 2019 · 2020Competition recordBronze medal · Gold medalJAJirawat AnunrojwongThailandIMO2012Competition recordGold medalIndexed profileJBJirayu BurapacheepThailandIOI2018Competition recordBronze medalJLJirayu LuewetwanitThailandIOI2012 · 2013Competition recordBronze medal · Silver medalJirayus JinapongThailandIMO2018 · 2019Number One Mathematics and Physics Tutoring CentreMathematics TutorAutumn profileJiří EichlerCzech RepublicIOI2012Scanlock International s.r.o.Full Stack EngineerAutumn profileJHJiří HájekCzech RepublicIOI1995Competition recordGold medalJKJiří KalvodaCzech RepublicIOI2019 · 2020 · 2021IXPERTAIT ConsultantIndexed profileJiří KalvodaCzech RepublicIMO2021Charles UniversityStudent, Department of Applied Mathematics, Charles UniversityAutumn profileJMJiří MoudrýCzechoslovakiaIMO1959Competition recordHonourable mentionJNJiří NavrátilCzechoslovakiaIMO1975 · 1976 · 1977Competition recordBronze medal · Silver medalJŘJiří ŘihákCzech RepublicIMO2007Kindwise (FlowerChecker)Co-Founder, Researcher, CTOIndexed profileJSJiří SgallCzechoslovakiaIMO1981 · 1982 · 1983Competition recordBronze medal · Silver medal · Gold medalJSJiří SoučekCzechoslovakiaIMO1960Competition recordSilver medalJSJiří SvobodaCzech RepublicIOI2000Competition recordBronze medalJTJiří TůmaCzechoslovakiaIMO1970VSB - Technical University of OstravaProfessorIndexed profile