All medalists.
IMO & IOI, including honourable mentions.
JNJesper NilssonSwedenIOI1992Competition recordBronze medalJØJesper Østergaard JensenDenmarkIMO1993FFF EnterprisesFFF ExecutiveIndexed profileJSJesper StrohDenmarkIMO1995Bech-BruunSenioradvokatIndexed profileJHJesreel Hasiholan SigalinggingIndonesiaIMO2025Competition recordBronze medalIndexed profileJFJesse FitiéNetherlandsIMO2019 · 2020LeanGameSoftware DeveloperIndexed profileJNJesse NieminenFinlandIMO2017Competition recordHonourable mentionAutumn profileJOJesse Obella EkanyaUgandaIMO2020Magnusson Klemencic AssociatesDesign EngineerIndexed profileJFJessica FintzenGermanyIMO2008Competition recordBronze medalIndexed profileJWJessica WanUnited States of AmericaIMO2024Competition recordGold medalJWJessica WeitbrechtIrelandIMO2013African Institute for Mathematical Sciences (AIMS)Outreach and Olympiad Manager at African Institute for Mathematical Sciences, RwandaIndexed profileJAJesús Alberto Figueroa CuroPeruIMO2010Competition recordSilver medalJÁJesús Ángel Advíncula AltamiranoPeruIMO2011 · 2012 · 2013Competition recordHonourable mention · Silver medalJPJesús Puente ArrubarrenaMexicoIMO2002Competition recordBronze medalJRJesús Rodríguez VioratoMexicoIMO1997CIMATPostdoctoral ResearcherIndexed profileJSJesus SanzSpainIOI1997Competition recordBronze medalJZJesús ZapataPeruIMO1997Competition recordHonourable mentionJvJethro van EkerenNew ZealandIMO2004IMPAProfessor de matemáticaIndexed profileJZJetze ZoethoutNetherlandsIMO2011 · 2012SogyoSoftware engineerIndexed profileJMJevgeni MartjuševEstoniaIMO2006Competition recordHonourable mentionJSJeyoun SiRepublic of KoreaIOI2017Competition recordGold medalJSJeysel SantiagoPeruIMO2001SoftwareOneTechnology ConsultantIndexed profileJLJhao-Syun LaiTaiwanIOI2022Competition recordSilver medalJEJholger EnriquezColombiaIMO2026Competition recordBronze medalJEJhosue Esteban Infante CarvajalEcuadorIMO2020ACADEMIA TESLAProfesor de matemáticas y físicaIndexed profileJFJiacheng FengPuerto RicoIMO2011 · 2012Competition recordHonourable mention · Bronze medalJMJiachen MiSwedenIMO2023 · 2024 · 2025Competition recordHonourable mention · Bronze medal · Silver medalJWJia-Ching WangTaiwanIMO1999 · 2000GoogleSoftware Engineer ManagerIndexed profileJFJiacong FangChinaIMO2003Competition recordGold medalJDJia De LiuMacauIMO2015 · 2017Competition recordHonourable mentionJRJiading RaoChinaIMO2013HuaweiAlgorithm EngineerIndexed profileJHJiafan HeChinaIMO2015Competition recordGold medalIndexed profileJFJiahai FengSingaporeIOI2014 · 2015Competition recordGold medal · Bronze medalJCJia-Han ChiamSingaporeIMO2007 · 2008 · 2009Two SigmaQuantitative ResearcherAutumn profile
Jia Hao Barry TngSingaporeIMO2009Ministry of Manpower (MOM)Senior Assistant Director, Co-LabAutumn profileJHJia Hao LiangMacauIMO2025Competition recordHonourable mentionJHJia Herng ChuahMalaysiaIMO2023 · 2025Sunway Mathematics ClubEvent ExecutiveIndexed profileJHJiajun HuangChinaIMO2019Competition recordGold medalJJJia Jun LeeMalaysiaIOI2019NVIDIA TaiwanSystem Software EngineerIndexed profileJYJialian YuChinaIMO1990Competition recordGold medalJYJiali YanFinlandIMO2012Competition recordHonourable mentionJLJialun LiChinaIMO2010Competition recordGold medalJMJia Min Charmaine SiaSingaporeIMO2003 · 2004 · 2005Competition recordBronze medalJNJia Natalia ChenNew ZealandIMO2012Competition recordBronze medalJPJianbo PengChinaIMO1994Competition recordGold medalJYJiangang YaoChinaIMO1994UBSExecutive DirectorIndexed profileJCJianglun ChenChinaIOI2018Competition recordGold medalJDJiangqi DaiChinaIOI2022Competition recordGold medalIndexed profileJHJian HeAustraliaIMO1995 · 1996Competition recordSilver medalJWJianhua WangChinaIMO1990Competition recordGold medalJLJianhui LiHong KongIMO2013Competition recordBronze medalJWJianmei WangChinaIMO1988Competition recordSilver medalJCJianxin ChenChinaIMO2001Alibaba GroupQuantum ScientistIndexed profileJHJianxun HeChinaIMO1987Competition recordBronze medalAutumn profileJZJian ZhangChinaIMO1994Competition recordGold medal
Jianzhi WangSingaporeIMO2017Jump Trading GroupQuantitative Researcher InternAutumn profileJHJiaoyang HuangChinaIMO2009Competition recordGold medalIndexed profile
Jiaqi YangChinaIOI2017Citadel SecuritiesQuantitative ResearcherAutumn profileJYJia-Ruei YuTaiwanIMO2012Competition recordHonourable mentionAutumn profileJHJiarui HanChinaIMO1997Two SigmaIndexed profileJLJiawei LiuChinaIOI2026Competition recordGold medal
Jia Hao Barry TngSingaporeIMO2009Ministry of Manpower (MOM)Senior Assistant Director, Co-LabAutumn profileJHJia Hao LiangMacauIMO2025Competition recordHonourable mentionJHJia Herng ChuahMalaysiaIMO2023 · 2025Sunway Mathematics ClubEvent ExecutiveIndexed profileJHJiajun HuangChinaIMO2019Competition recordGold medalJJJia Jun LeeMalaysiaIOI2019NVIDIA TaiwanSystem Software EngineerIndexed profileJYJialian YuChinaIMO1990Competition recordGold medalJYJiali YanFinlandIMO2012Competition recordHonourable mentionJLJialun LiChinaIMO2010Competition recordGold medalJMJia Min Charmaine SiaSingaporeIMO2003 · 2004 · 2005Competition recordBronze medalJNJia Natalia ChenNew ZealandIMO2012Competition recordBronze medalJPJianbo PengChinaIMO1994Competition recordGold medalJYJiangang YaoChinaIMO1994UBSExecutive DirectorIndexed profileJCJianglun ChenChinaIOI2018Competition recordGold medalJDJiangqi DaiChinaIOI2022Competition recordGold medalIndexed profileJHJian HeAustraliaIMO1995 · 1996Competition recordSilver medalJWJianhua WangChinaIMO1990Competition recordGold medalJLJianhui LiHong KongIMO2013Competition recordBronze medalJWJianmei WangChinaIMO1988Competition recordSilver medalJCJianxin ChenChinaIMO2001Alibaba GroupQuantum ScientistIndexed profileJHJianxun HeChinaIMO1987Competition recordBronze medalAutumn profileJZJian ZhangChinaIMO1994Competition recordGold medalJianzhi WangSingaporeIMO2017Jump Trading GroupQuantitative Researcher InternAutumn profileJHJiaoyang HuangChinaIMO2009Competition recordGold medalIndexed profileJiaqi YangChinaIOI2017Citadel SecuritiesQuantitative ResearcherAutumn profileJYJia-Ruei YuTaiwanIMO2012Competition recordHonourable mentionAutumn profileJHJiarui HanChinaIMO1997Two SigmaIndexed profileJLJiawei LiuChinaIOI2026Competition recordGold medal