Ivan Katanić

Ivan Katanić is a Croatian software engineer and competitive-programming medalist. He represented Croatia at the International Olympiad in Informatics in 2010 and 2011, winning IOI gold in 2011, and studied at FER, University of Zagreb. He is associated online with the handle ikatanic (GitHub, Codeforces, TopCoder, ORCID); his GitHub profile lists London, UK. A LinkedIn directory listing describes him as a Quantitative Developer at Jump Trading LLC. Employment details rest on index/search snippets rather than a dated first-party profile read, so the quant-employment claim is retained as unresolved.

Notes10

• Quant employment verification: UNRESOLVED. LinkedIn's public directory snippet lists Ivan Katanić as 'Quantitative Developer at Jump Trading LLC', and a separately surfaced Jane Street puzzle-credit line shows an 'Ivan Katanic' among solvers. Neither is independent confirmation of an actual role: the LinkedIn entry is index/search-snippet only (no dated role text read from the profile), and appearing in a Jane Street puzzle's solver list is a public-puzzle credit, not evidence of employment or an internship. Jump Trading LLC operates a quantitative/HFT trading business; Jane Street is a quantitative trading firm and liquidity provider. No first-party (company, résumé, or personal-page) statement of a dated role was found, so a CONFIRMED finding is not supportable and the claim is retained as unresolved.
• Represented Croatia at the International Olympiad in Informatics in 2010 and 2011; a 2011 HSIN delegation document names 'Ivan Katanić, student 1. godine FER-a, Zagreb' holding a gold medal at IOI and gold at CEOI, and a Croatian report lists him with a gold medal as a 4th-year student at Gimnazija Požega at IOI.
• Enrolled at the Faculty of Electrical Engineering and Computing (FER), University of Zagreb: a University of Zagreb news item describes him as 'Ivan Katanić, FER, student 1. godine diplomskoga studija' (first year of the master's/diploma programme) when the team took first place at the Central European ACM (CERC) contest.
• His GitHub account is ikatanic (github.com/ikatanic), profile location London, UK, blog https://ikatanic.github.io/; repos include okasaki-ocaml (exercises from Okasaki's Purely Functional Data Structures), cfparser (a Codeforces contest parser written in OCaml) and solveth (an Ethereum bounty problem-solving platform).
• Co-authored the academic paper 'Fast and simple algorithms for computing both LCSk and LCSk+' (Pavetić, Katanić, Matula, Žužić, Šikić, 2017), linked from his GitHub repo lcskpp and cited on ORCID.
• FER's list of state awards records 'Stjepan Glavina, Ivan Katanić, Gustav Matula (studenti)' in 2015, a Croatian state recognition tied to his student competitive-programming record.
• His personal site states 'Hi, I'm Ivan. You can contact me at [contact omitted]' and hosts a post 'Fast polynomial multiplication' dated Sep 22, 2018, indicating a blog active at least through 2018.
• A competitive-programming participants dataset records 'Ivan Katanic / ikatanic ... ACM ICPC Silver (2014), IOI Gold (2011), Silver (2010)', corroborating the same handle across the IOI/ICPC/Codeforces ecosystem.
• The Competitive Programming Hall of Fame profile topcoder:ikatanic lists Ivan Katanic, country Croatia, prize money $3100, tying the competitive-programming identity to prize-winnings across contests.