Antun Razum

Antun Razum is a Croatian software developer at Jane Street, based in London. He represented Croatia at the 24th International Olympiad in Informatics (IOI 2012, Sirmione/Montichiari, Italy), winning a silver medal as a 4th-year student at XV. gimnazija in Zagreb. He studied at the University of Zagreb's Faculty of Electrical Engineering and Computing (FER), earning B.Sc. and M.Sc. degrees in Computer Science, and competed on university teams at the CERC/ICPC regional contest. Earlier roles include software engineering internships at Facebook (2014, 2015) and a Jane Street software developer internship in 2016 on the pretrade and posttrade teams, before joining Jane Street as a software developer in 2017. His public GitHub account (arazum) hosts small personal tools such as hzpp, a train-schedule app. Employment details here rest on LinkedIn-index data and are labeled index-only; identity is corroborated by primary Olympiad and university sources.

Notes9

• Quant employment verification: CONFIRMED - (a) identity is supported by primary sources (IOI 2012 Croatia silver; University of Zagreb/FER CERC 2014 team; XV. gimnazija), and (b) the employment evidence shows an actual internship (Jane Street SWE Intern, 2016, pretrade/posttrade teams) and an actual full-time role (Jane Street Software Developer, from Sept 2017). However, the employment evidence is index-only (LinkedIn index), not independently corroborated by a Jane Street or other primary page; the classification rests on Jane Street's own site confirming it is a quantitative trading firm. Employer Jane Street = quantitative trading / market-making; role = software developer. No bank or other quant-finance employer appears in the record.
• LinkedIn index (index-only, NOT independent primary confirmation) lists Jane Street as 'Software Developer' in London from Sept 2017 and a Jane Street 'Software Developer Intern' in 2016 on the pretrade and posttrade teams; the 2016 internship is an actual work internship, not a camp or insight event.
• Employer classification: Jane Street is a quantitative trading firm/market maker (proprietary trading across equities, bonds, FX and commodities), i.e. it genuinely operates in quantitative finance; the role is a software-development role supporting that business. Classifying the employer from its own site, not from the company name.
• Silver medal at IOI 2012 (24th International Olympiad in Informatics, held 23-30 Sept 2012 at Lago di Garda, Sirmione/Montichiari, Italy); competed as a 4th-year student of XV. gimnazija, Zagreb, one of four Croatian representatives. Primary source, not an index.Oct 3, 2012
• LinkedIn open-web index (lead-only, not primary confirmation) lists Jane Street Software Developer, London, from 2017, and a 2016 Jane Street Software Developer Internship on the Pretrade and Posttrade teams.
• University of Zagreb news and the CERC 2014 report document a Zagreb team including Razum taking first place among Central European universities at the 2014 ACM ICPC CERC regional contest held in Krakow, 14-16 Nov 2014. Primary source.Nov 2014
• IOI 2012 (24th International Olympiad in Informatics, Sirmione, Italy) silver medal, representing Croatia; cphof.org contest timeline shows IOI 2012 rank 60 and a TopCoder High School 2010 placement.Sep 2012
• stats.ioinformatics.org person record (#2709) lists Antun Razum as a Croatian IOI contestant with a 2012 award, corroborating the olympiad identity independently of the LinkedIn index.Sep 2012
• LinkedIn index lists two Facebook Software Engineering internships, 2014 (web speed team) and 2015 (Android efficiency & reliability team), both in Menlo Park; these are index-only, not primary-source confirmed.
• cphof.org contest timeline records IOI 2012 silver (rank 60) and a 2010 TopCoder High School placement (68th), and links a TopCoder profile under handle 'arazum'.Sep 2012
• GitHub account 'arazum' is linked from the LinkedIn-enrichment backbone as Antun Razum's GitHub; repos include hzpp (HZ train schedule) and runner.
• LinkedIn index lists several teaching-assistant roles at FER (Algorithms and Data Structures, Electronics I, Mathematics I, 2013-2014) plus competition problem authoring for the Croatian Education and Teacher Training Agency (2012-2015) and head instructor of the XV. gimnazija programming competition team (2012-2014); index-only.