Tomek Czajka

Work Experience

• 2021: Machine learning support for Magnus Carlsen’s team at FIDE World Chess Championship, Dubai, UAE.
• 2014−2020: Flight Software Engineer at SpaceX, Hawthorne, CA.
  • Crew Dragon guidance and navigation.
  • Starlink guidance and navigation.
• 2007−2013: Software Engineer at Google, Mountain View, CA.
  • Datacenter infrastructure optimization.
  • Commerce search quality.
  • Ads distribution.
  • Code Jam.
• 2023: Member of the jury at Polish collegiate programming competition.
• 2013: Coach for the Polish national high school team at Polish Olympiad in Informatics.
• 2005: Internship at Google, Mountain View, CA.
• 2005: Assistant coach for the USA national team at USA Computing Olympiad.
• 2005: Team leader of the Polish team at International Olympiad in Informatics.
• 2004: Teaching assistant at Purdue University. Data Structures.
• 2003−2004: Teaching assistant at Warsaw University.
• 2003−2004: Teaching a programming course to high school students in Poland.
• 2000−2004: Member of the jury at Polish Olympiad in Informatics.
• 2000−2004: Teaching at science camps for gifted high school students at science camps run by Polish Children’s Fund.
• 2003: Internship at Microsoft.
  • CLR Performance team.
• 2001: Internship at IBM T.J.Watson Research Center, Hawthorne, NY.
  • Natural Language Processing.

Open source software

• 2020−2023: Big integer library ibig.

Education

• 2004−2007: Purdue University, Computer Science, Master of Science
• 2000−2004: Warsaw University, Faculty of Mathematics, Informatics and Mechanics, Bachelor of Science

Programming competitions

• International Collegiate Programming Contest: Team programming contest for university students.
  • 2003, Beverly Hills, CA: winner
  • 2001, Vancouver, Canada: 6th place
• TopCoder Open, Algorithm track.
  • 2008, Las Vegas, NV: winner
  • 2007, Las Vegas, NV: 6th place
  • 2006, Las Vegas, NV: 2nd place
  • 2004, Santa Clara, CA: winner
  • 2003, Uncasville, CT: winner
• TopCoder Collegiate Challenge: International programming contest for university students.
  • 2006, San Diego, CA: semifinal
  • 2005, Santa Clara, CA: 2nd place
  • 2004, Boston, MA: winner
• International Olympiad in Informatics: International programming contest for high school students.
  • 2000, Beijing, China: 14th place (gold medal)
  • 1999, Antalya, Turkey: 19th place (gold medal)
  • 1998, Troia, Portugal: 36th place (silver medal)
• CodeCup: Online board game AI tournament.
  • 2024, Sudoku: winner
  • 2023, Entropy: 3rd place
  • 2022, Spaghetti: 2nd place
  • 2020, Gomoku: winner
  • 2019, Flippo: winner
  • 2012, Quantum tic-tac-toe: winner
  • 2010, Dvonn: 2nd place
  • 2009, Pillars: winner
  • 2008, Alquerque: winner
  • 2006, Turn Right: winner
• Challenge 24: International 24h team programming contest.
  • 2014, Budapest, Hungary: winner
• Google Code Jam: International programming contest.
  • 2006, New York, NY: 5th place
  • 2004, San Jose, CA: 4th place
  • 2003, San Jose, CA: 4th place
• Google Code Jam Europe.
  • 2006, Dublin, Ireland: winner
• Central European Collegiate Programming Contest: Team programming contest.
  • 2002, Warsaw, Poland: winner
  • 2001, Warsaw, Poland: second place
  • 2000, Prague, Czech Republic: winner
• ACM ICPC Java Challenge: Team programming competition.
  • 2001, Vancouver, Canada: winner
• Central European Olympiad in Informatics: Programming competition for high school students.
  • 2000, Cluj-Napoca, Romania: 3rd place (gold medal)
  • 1998, Zadar, Croatia: 4th place (gold medal)
• USA Computing Olympiad: Programming competition for high school students.
  • 2000 Open: winner
  • 2000 Spring: winner
• Internet Problem Solving Contest: Online team programming contest.
  • 2012: winner
  • 2011: 2nd place
  • 2010: winner
  • 2009: 2nd place
  • 2008: winner
  • 2007: 4th place
  • 2006: winner

Mathematics competitions

• International Mathematics Olympiad: International mathematics competition for high school students.
  • 2000, Taejon, South Korea: 68th place (silver medal)
  • 1998, Taipei, Taiwan: 49th place (siler medal)
  • 1997, Mar del Plata, Argentina: 299th place (honorable mention)
• Vojtech Jarnik International Mathematical Competition: European mathematics competition for university students.
  • 2004: 6th place
  • 2003: 8th place
  • 2002: 5th place
  • 2001: 3rd place
• International Mathematics Competition: International mathematics competition for university students.
  • 2002: 40th place (Second Prize)

Scholarships

• 2004: Ross Fellowship at Purdue University
• 1997−2001: Scholarship of the Polish Minister of Education for exceptional achievements in the field of science
• 1998: “Wyzwania” Foundation and Headmasters’ Conference HMC scholarship to Warwick School, Warwick, UK
• 1993−1999: Scholarship of the Polish Children’s Fund

Publications

• Tomek Czajka, Gopal Pandurangan. Improved Random Graph Isomorphism. Journal of Discrete Algorithms, vol. 6, 85−92, 2008.

Patents

• Marcel M. M. Yung, Tomasz Czajka. Privacy-preserving measurements of a campaign

Programming languages experience

• Rust, C++, Python, Ocaml, SML, Haskell