All medalists.
IMO & IOI, including honourable mentions.
JJJuan José Martínez BarretoVenezuelaIMO2023Competition recordHonourable mentionJJJuan José Pérez GuerraArgentinaIMO2015Competition recordHonourable mentionJLJuan Luis Manriquez SequeraMexicoIMO2026Competition recordBronze medalJMJuan Manuel Hernández HerreraColombiaIMO2002Competition recordBronze medalJMJuan Martín GonzalezUruguayIMO2025Competition recordHonourable mentionJMJuan Mathius TasaycoPeruIMO2023Competition recordSilver medalJNJuan NeyraPeruIMO2000Competition recordHonourable mentionJPJuan Pablo Medina JuradoPeruIMO2003Competition recordHonourable mentionIndexed profileJPJuan Paucar ZanabriaPeruIMO2011Competition recordBronze medalJPJuan PereiraColombiaIMO1984 · 1985Competition recordBronze medalJRJuan RiveraChileIMO1994Competition recordSilver medalJSJuan Sebastian DíazColombiaIMO2013 · 2014 · 2015Competition recordBronze medal · Silver medalJSJuan Sebastian RodriguezArgentinaIMO1998 · 1999TecotexEjecutivo de Cuentas Senior TECOTEX S.A.C.I.F.I. y A.Indexed profileJRJubayer RahmanBangladeshIOI2017UpworkAndroid DeveloperIndexed profileJGJu Gang NamRepublic of KoreaIMO2005 · 2006Samsung DisplayPrincipal EngineerIndexed profileJAJuha ArpiainenFinlandIOI2003Competition recordSilver medalJHJuha HarviainenFinlandIOI2017 · 2018Competition recordBronze medal · Silver medalIndexed profileJLJuha LemmettiFinlandIMO1994spogen.aiCOO & Co-FounderIndexed profileJAJuhan AruEstoniaIMO2003 · 2004 · 2005Competition recordHonourable mention · Bronze medalJNJuha NummipuroFinlandIMO1973Competition recordBronze medalJAJuho AralaFinlandIMO2019 · 2020 · 2021 · 2022Competition recordHonourable mention · Bronze medalJRJuho RöysköFinlandIOI2020 · 2021University of HelsinkiResearch AssistantIndexed profileJYJuho Yli-KrekolaFinlandIOI1994Competition recordBronze medalIndexed profileJHJu Hyok SimDemocratic People's Republic of KoreaIMO2019Competition recordGold medalJHJu Hyon HwangDemocratic People's Republic of KoreaIMO2026Competition recordGold medalJLJui-Min LeeTaiwanIOI2010 · 2011Competition recordSilver medal · Gold medalJYJui-Nan YenTaiwanIOI2016GoogleStudent ResearcherIndexed profileJKJukka KohonenFinlandIMO1990Competition recordHonourable mention
Jukka SireniFinlandIMO2006OP Financial GroupSenior Data AnalystAutumn profileJSJukka SuomelaFinlandIMO1995Aalto UniversityFull ProfessorIndexed profileJCJul ComhaireBelgiumIMO2023Competition recordHonourable mentionIndexed profileJVJuleana Villegas SeguraCosta RicaIMO2012 · 2013nyris GmbHMachine Learning EngineerIndexed profileJPJules PondardFranceIOI2011 · 2012 · 2013France-ioiVolunteerIndexed profileJAJulián Alonso Mejía CorderoPeruIMO2009The Ohio State UniversityLecturerIndexed profileJAJulian ArndtsGermanyIMO1999Competition recordBronze medalJBJulian BaldusGermanyIOI2013Competition recordSilver medalIndexed profileJDJulian DemeioItalyIMO2011 · 2012Competition recordHonourable mentionIndexed profileJDJulian DörflerGermanyIOI2015TDK EuropeManager IC CollaborationIndexed profileJFJulian FischerGermanyIOI2008anyninesCEOIndexed profileJHJulian HessenbergerAustriaIOI2025HDI GroupData ScienceIndexed profileJJJulián José Ramírez AguilarCosta RicaIMO2026Competition recordHonourable mentionJLJulian LabeitGermanyIOI2012IMPARGO GmbHCTOIndexed profileJLJulian LyczakNetherlandsIMO2006Competition recordHonourable mentionJMJulián Martín EisenschlosArgentinaIMO2006Google DeepMindSenior Staff Research ScientistIndexed profileJMJulián MasliahArgentinaIMO2017 · 2018Competition recordSilver medalAutumn profileJMJulián Máximo CabreraArgentinaIOI2023Competition recordHonourable mentionJMJulián Máximo CabreraArgentinaIMO2019 · 2020 · 2021 · 2022Competition recordBronze medal · Silver medalJRJulian Robin VöllmeckeGermanyIMO2021Competition recordHonourable mentionJWJulian WestCanadaIMO1981Competition recordBronze medalJCJulien CassaigneFranceIMO1987 · 1988CNRSchargé de rechercheIndexed profileJCJulien CoppeBelgiumIMO2004NexovaIndexed profile
Julien PortierFranceIMO2014 · 2015EPFLPostdoctoral ResearcherAutumn profile
Julien SamahaFranceIMO1995Citadel LLCTech Lead - CommoditiesAutumn profileJSJulie Schøtt HvidbergDenmarkIMO2025 · 2026Competition recordHonourable mentionIndexed profileJBJuliet Bringas MirandaCubaIMO2019Competition recordHonourable mentionIndexed profileJFJuliette FournierFranceIMO2008Competition recordBronze medalJRJuliette RouxSouth AfricaIMO2020 · 2021 · 2022Competition recordHonourable mention · Bronze medalJPJulija PaliulionytėLithuaniaIMO2018 · 2019Competition recordHonourable mention · Bronze medalJCJulio César Aguilar CabreraMexicoIMO1993Competition recordBronze medalJCJúlio Cesar de Souza RebeloBrazilIMO1990Competition recordBronze medal
Jukka SireniFinlandIMO2006OP Financial GroupSenior Data AnalystAutumn profileJSJukka SuomelaFinlandIMO1995Aalto UniversityFull ProfessorIndexed profileJCJul ComhaireBelgiumIMO2023Competition recordHonourable mentionIndexed profileJVJuleana Villegas SeguraCosta RicaIMO2012 · 2013nyris GmbHMachine Learning EngineerIndexed profileJPJules PondardFranceIOI2011 · 2012 · 2013France-ioiVolunteerIndexed profileJAJulián Alonso Mejía CorderoPeruIMO2009The Ohio State UniversityLecturerIndexed profileJAJulian ArndtsGermanyIMO1999Competition recordBronze medalJBJulian BaldusGermanyIOI2013Competition recordSilver medalIndexed profileJDJulian DemeioItalyIMO2011 · 2012Competition recordHonourable mentionIndexed profileJDJulian DörflerGermanyIOI2015TDK EuropeManager IC CollaborationIndexed profileJFJulian FischerGermanyIOI2008anyninesCEOIndexed profileJHJulian HessenbergerAustriaIOI2025HDI GroupData ScienceIndexed profileJJJulián José Ramírez AguilarCosta RicaIMO2026Competition recordHonourable mentionJLJulian LabeitGermanyIOI2012IMPARGO GmbHCTOIndexed profileJLJulian LyczakNetherlandsIMO2006Competition recordHonourable mentionJMJulián Martín EisenschlosArgentinaIMO2006Google DeepMindSenior Staff Research ScientistIndexed profileJMJulián MasliahArgentinaIMO2017 · 2018Competition recordSilver medalAutumn profileJMJulián Máximo CabreraArgentinaIOI2023Competition recordHonourable mentionJMJulián Máximo CabreraArgentinaIMO2019 · 2020 · 2021 · 2022Competition recordBronze medal · Silver medalJRJulian Robin VöllmeckeGermanyIMO2021Competition recordHonourable mentionJWJulian WestCanadaIMO1981Competition recordBronze medalJCJulien CassaigneFranceIMO1987 · 1988CNRSchargé de rechercheIndexed profileJCJulien CoppeBelgiumIMO2004NexovaIndexed profileJulien SamahaFranceIMO1995Citadel LLCTech Lead - CommoditiesAutumn profileJSJulie Schøtt HvidbergDenmarkIMO2025 · 2026Competition recordHonourable mentionIndexed profileJBJuliet Bringas MirandaCubaIMO2019Competition recordHonourable mentionIndexed profileJFJuliette FournierFranceIMO2008Competition recordBronze medalJRJuliette RouxSouth AfricaIMO2020 · 2021 · 2022Competition recordHonourable mention · Bronze medalJPJulija PaliulionytėLithuaniaIMO2018 · 2019Competition recordHonourable mention · Bronze medalJCJulio César Aguilar CabreraMexicoIMO1993Competition recordBronze medalJCJúlio Cesar de Souza RebeloBrazilIMO1990Competition recordBronze medal