All medalists.
IMO & IOI, including honourable mentions.
JHJán HozzaSlovakiaIOI2010 · 2011UndisclosedSoftware EngineerAutumn profileJDJānis DričsLatviaIMO2000Competition recordBronze medalJPJānis PudānsLatviaIMO2020Competition recordHonourable mentionJSJānis SermuliņšLatviaIOI1997 · 1998 · 1999Competition recordGold medal · Bronze medalJSJānis SmilgaLatviaIMO2009 · 2011Competition recordHonourable mention · Silver medalAutumn profileJKJan Kanty MilczekPolandIOI2010 · 2011GoogleSoftware Engineer - MLIndexed profileJKJan KáraCzech RepublicIOI1998SUSEsoftware developerIndexed profileJKJan KneißlerGermanyIMO1990University of BernResearcherIndexed profileJBJanko BušelićCroatiaIMO2022 · 2023Competition recordBronze medalJKJan Koen AnnotNetherlandsIMO1979Competition recordBronze medalJHJanko Hernandez CortesCubaIMO1993Competition recordSilver medalJKJan KotasCzechoslovakiaIOI1992Competition recordSilver medalJKJan KratochvílCzechoslovakiaIMO1976 · 1978Charles UniversityProfessorIndexed profileJKJan KratochvílCzech RepublicIOI1997Competition recordBronze medalJKJan Kristian HauglandNorwayIMO1989 · 1990 · 1991 · 1992Nasjonal sikkerhetsmyndighetResearcherIndexed profileJKJan KuipersNetherlandsIOI1999ElasticPrincipal Machine Learning EngineerIndexed profileJKJan KybicCzechoslovakiaIOI1992Competition recordSilver medalIndexed profileJKJan KynčlCzech RepublicIMO2000 · 2001Czech Technical University in Pragueassociated professorIndexed profileJLJan LönnbergFinlandIOI1998Jan Lönnberg OyOwnerIndexed profileJMJan MachCzech RepublicIMO1994Competition recordHonourable mentionJMJan MatějkaCzech RepublicIMO2008 · 2009MicrosoftSoftware EngineerIndexed profileJMJan MikulasSlovakiaIOI2006Linde Material Handling SlovenskoSales Manager VNA and rack at Linde Material HandlingIndexed profileJMJán MikulášSlovakiaIMO2006Competition recordBronze medalJMJan MoláčekCzech RepublicIMO2002 · 2003 · 2004ZEISS Semiconductor Manufacturing TechnologyResearch ScientistIndexed profileJJJanne JunnilaFinlandIMO2008Competition recordHonourable mentionJKJanne KokkalaFinlandIOI2006GoogleSoftware EngineerIndexed profileJKJanne KokkalaFinlandIMO2006GoogleSoftware EngineerIndexed profileJNJan NekovářCzechoslovakiaIMO1978 · 1979 · 1981Competition recordSilver medal · Gold medalJKJanne KujalaFinlandIOI1996Competition recordGold medalJVJanno VeeorgEstoniaIOI2013Competition recordBronze medalJVJanno VeeorgEstoniaIMO2011 · 2012 · 2013Competition recordHonourable mention · Bronze medalJOJan OlkowskiPolandIOI2017Competition recordBronze medalJOJán OravecSlovakiaIOI2000 · 2001Competition recordSilver medal · Gold medalJCJános CsirikHungaryIMO1989 · 1990The D. E. Shaw GroupSenior Vice PresidentAutumn profileJKJános KollárHungaryIMO1973 · 1974Competition recordGold medalJKJános KomlósHungaryIMO1960Rutgers University–New BrunswickProfessor of Mathematics at Rutgers UniversityIndexed profile
János KramárCanadaIMO2004Google DeepMindResearch EngineerAutumn profileJNJános NagyHungaryIMO2009 · 2010 · 2011Competition recordSilver medal · Gold medal · Bronze medalJPJános PintzHungaryIMO1967 · 1968 · 1969Competition recordBronze medal · Gold medalIndexed profileJVJános VinczeHungaryIOI2007ERP Consulting Plc.Chief ArchitectIndexed profileJPJan PetrCzech RepublicIMO2017Competition recordBronze medalJPJan PolášekCzech RepublicIOI2010Competition recordBronze medalJPJan PöschkoAustriaIMO2004Competition recordHonourable mentionJPJan PriessnitzCzech RepublicIOI2017PhD students of the Max Planck Institute for the Physics of Complex SystemsDoctoral StudentIndexed profileJRJan RempałaPolandIMO1962Competition recordBronze medalJFJan-Sebastian FabíkCzech RepublicIOI2014MetaSoftware EngineerIndexed profileJŠJán ŠefčíkCzechoslovakiaIMO1984 · 1985Slovak Research and Development AgencyPresidium memberIndexed profileJSJán SenkoSlovakiaIOI1998 · 1999Competition recordGold medal · Bronze medalJSJan SiwanowiczPolandIMO1994Competition recordBronze medalJSJan SlívaCzech RepublicIOI2024Institute of Information Theory and Automation of the ASCRStudent InternIndexed profileJŚJan ŚliwaPolandIMO1968Competition recordSilver medalJSJan SöderkvistSwedenIMO1979Competition recordSilver medalJHJanson HoMalaysiaIOI2026Competition recordSilver medalJHJanson HoMalaysiaIMO2025 · 2026Competition recordSilver medal · Gold medalAutumn profileJSJan SoukupCzech RepublicIMO2015Competition recordHonourable mentionJŠJán ŠpakulaSlovakiaIMO1997 · 1998Competition recordHonourable mention · Bronze medalJEJanssen Edyth LimIndonesiaIMO2025Competition recordBronze medalJSJan StojanovskiNorth MacedoniaIMO2022 · 2023Competition recordBronze medal · Honourable mentionJSJan StopkaCzech RepublicIMO2012Competition recordHonourable mentionJŠJan ŠťovíčekCzech RepublicIMO1998Competition recordBronze medal
János KramárCanadaIMO2004Google DeepMindResearch EngineerAutumn profileJNJános NagyHungaryIMO2009 · 2010 · 2011Competition recordSilver medal · Gold medal · Bronze medalJPJános PintzHungaryIMO1967 · 1968 · 1969Competition recordBronze medal · Gold medalIndexed profileJVJános VinczeHungaryIOI2007ERP Consulting Plc.Chief ArchitectIndexed profileJPJan PetrCzech RepublicIMO2017Competition recordBronze medalJPJan PolášekCzech RepublicIOI2010Competition recordBronze medalJPJan PöschkoAustriaIMO2004Competition recordHonourable mentionJPJan PriessnitzCzech RepublicIOI2017PhD students of the Max Planck Institute for the Physics of Complex SystemsDoctoral StudentIndexed profileJRJan RempałaPolandIMO1962Competition recordBronze medalJFJan-Sebastian FabíkCzech RepublicIOI2014MetaSoftware EngineerIndexed profileJŠJán ŠefčíkCzechoslovakiaIMO1984 · 1985Slovak Research and Development AgencyPresidium memberIndexed profileJSJán SenkoSlovakiaIOI1998 · 1999Competition recordGold medal · Bronze medalJSJan SiwanowiczPolandIMO1994Competition recordBronze medalJSJan SlívaCzech RepublicIOI2024Institute of Information Theory and Automation of the ASCRStudent InternIndexed profileJŚJan ŚliwaPolandIMO1968Competition recordSilver medalJSJan SöderkvistSwedenIMO1979Competition recordSilver medalJHJanson HoMalaysiaIOI2026Competition recordSilver medalJHJanson HoMalaysiaIMO2025 · 2026Competition recordSilver medal · Gold medalAutumn profileJSJan SoukupCzech RepublicIMO2015Competition recordHonourable mentionJŠJán ŠpakulaSlovakiaIMO1997 · 1998Competition recordHonourable mention · Bronze medalJEJanssen Edyth LimIndonesiaIMO2025Competition recordBronze medalJSJan StojanovskiNorth MacedoniaIMO2022 · 2023Competition recordBronze medal · Honourable mentionJSJan StopkaCzech RepublicIMO2012Competition recordHonourable mentionJŠJan ŠťovíčekCzech RepublicIMO1998Competition recordBronze medal