ICPC CLI Symposium

2025 Biographies

CLI Symposium Chair

Christian Yongwhan Lim
(VP of Engineering, Arklex AI)

  • Chair, 2025 ICPC CLI Symposium
  • Director of Internships, ICPC Foundation
  • Senior Editor, ICPC Journal – The Journal of Competitive Learning
  • Chief Judge, ICPC North America Mid-Central Region
  • Coach, Columbia University (2022-Present)
    • 2024 ICPC North America Championship Silver Medalist Team (3rd Place)
    • 2021 Greater New York Regional Champion (1st Place)
  • 2024 Outstanding Mentorship Award – Quatrefoil Medal
  • 2023 Excellence in Leadership Award from ICPC North America

ICPC Compete Track

Etienne Vouga, Session Chair
(Associate Professor, University of Texas at Austin)

  • Regional Contest Director, ICPC North America South Central
  • Chief Judge, 2025 ICPC North America Championship

John Buck
(VP Engineering, C-Scape, Inc.)

  • Chief Judge, ICPC North America East Division
  • Chief Judge, Greater New York Region since 2002
  • Primary CCS Group leader at NAC2025, WF49 Baku, Greater New York Region and Pacific NW Region
  • Shadow CCS Group leader at WF46/47 Luxor, WF48 Astana, NAC2024
  • ICPC North America 2025 Excellence in Leadership Award
  • PC2 CCS Developer

Marc Furon
(Technical Director and Judge, ICPC North America Southern California)

  • Technical Director and Judge, ICPC North America Southern California
  • Former Regional Contest Director, ICPC North America Southern California
  • Organizing Committee, 2020 ICPC North America Championship (NAC)
  • Technical Team, ICPC World Finals (2022-Present)

Mateusz Radecki
(University of Warsaw)

  • Radewoosh, 5th, CodeForces
  • 4th, 2025 Universal Cup
  • 3rd, 2024 Facebook Hacker Cup
  • 4th, 2019 ICPC World Finals
  • Champion, 2018 Distributed Code Jam
  • 14th, 2016 IOI

Tolga Can
(Teaching Professor, Colorado School of Mines)

  • Co-coach, Colorado School of Mines
  • Site Director, Colorado School of Mines, Rocky Mountain Regional Contest
  • Team Leader, IOI, Turkey (2018-2021)
  • Deputy Team Leader, IOI, Turkey (2013-2015)

Ryan Farrell
(Associate Professor, Brigham Young University)

  • Coach, Brigham Young University (2019-present)
  • Coach, 2023 ICPC World Finals Bronze Medal Team, BYU TTL 255
  • Site Director (BYU), Rocky Mountain Regional Contest

ICPC Educate Track

Erich Baker, Session Chair
(Vice Provost and Professor, Belmont University)

  • Editor-in-Chief, ICPC Journal – The Journal of Competitive Learning
  • Former Department Chair and Dean, Baylor University
  • 110 publications in peer-reviewed journals and conference proceedings
  • Supported by more than 17 grant awards

Jerzy Jaromczyk
(Emeritus Professor, University of Kentucky)

  • Emeritus Faculty, University of Kentucky
  • Coach, University of Kentucky, (1998-present)
  • 4 ICPC World Finals, 3 NAC participations
  • Multiple years as satellite site director for Mid-Central Regionals
  • Promoting computing in Kentucky K-12
  • Funded collaborative interdisciplinary projects in Research for Computing for Humanities, Bioinformatics, and Education
  • Awarded teacher

Bob Roggio
(Emeritus Professor, University of North Florida)

  • Executive Council Member, Upsilon Pi Epsilon (1986-2022)
  • Retired Officer, United States Air Force (1961-1981)
  • Faculty Positions at Auburn University, University of Mississippi, and University of North Florida
  • Involved with the ICPC since 1986

Zhou Yu
(Associate Professor, Columbia University; Founder & CEO, Arklex AI)

  • Associate Professor of Computer Science, Columbia University
  • Forbes 30 under 30, 2018 Science
  • CMU LTI PhD
  • Founder & CEO, Arklex AI

ICPC Library Track

Fredrik Niemelä, Session Chair
(Founder & CPO, Kattis)

  • ICPC Problem Archive Director
  • ICPC Standards Committee Chair
  • DeBlasi Outstanding Contribution Award winner 2011 & 2012
  • ICPC CLI Fellow since 2012
  • Coach, KTH – Royal Institute of Technology (WF Gold 2004, Silver 2005, Bronze 2010)
  • Inventor of the resolver
  • Founder of ICPC Live
  • Founder of Kattis

Arup Guha
(Senior Instructor, University of Central Florida)

  • Coach, University of Central Florida (2003-Present)
    • Coach, 2018 ICPC World Finals Bronze Medal Team UCF Raptor
    • Coach, 2020 NAC Bronze Medal Team UCF Kamino
  • UCF Senior Instructor Computer Science Department
    • Runs ICPC Style Class: Problem Solving and Team Dynamics (2014-Present)

Joshua Andersson
(Chalmers University of Technology)

  • Chief Judge, Swedish Olympiad in Informatics
  • Team Leader, IOI, Sweden
  • Prepared over 100 problems using the Kattis problem format, updated over 400 old problems
  • Ranked #36 globally on Kattis

Rasmus Hulthe
(Chalmers University of Technology)

  • Problem solver
  • Software Engineering, digIT (2024-2025)
  • Intern, AI Engineer R&D, Huawei Sweden (2024-2025)
  • Participant, MeetIT camp (2021)
  • Apprentice, Cybercom group (2018)

Miguel Revilla Rodríguez
(OJBooks)

  • Online Judge Manager
  • ICPC Archivist
  • Editor and Translator for the Spanish editions:
    • “Competitive Programming” by Steven Halim, Felix Halim, and Suhendry Effendy
    • “Algorithms Illuminated” by Tim Roughgarden
    • “Programming Challenges” by Steven S. Skiena and Miguel A. Revilla
  • Involved with the ICPC since 2005