Toni Brajko

FER (University of Zagreb) CS student and Croatian competitive programmer: IOI 2023 bronze, CEOI 2023 bronze, ICPC World Finals 2025 silver medal and Europe Champion (7th place) with the Zagreb team. Past Junior Algorithm Engineer at Huawei; LinkedIn index lists a Software Engineer Intern role at Jump Trading and a problemsetter role at the Croatian Informatics Association.

Notes6

• Quant employment verification: UNRESOLVED. Identity is well-supported: the LinkedIn profile linked by the caller (toni-brajko-25905b259) matches the name, FER Zagreb CS student status and Croatian competitive-programming record (IOI 2023 bronze, ICPC World Finals 2025). The only employment evidence for a quantitative-trading role is that same LinkedIn profile, which lists a Software Engineer Intern role at Jump Trading. Jump Trading is a genuine Chicago-headquartered proprietary/algorithmic trading firm (employer classification: quantitative proprietary trading). However, this is a single self-reported profile listing surfaced via search/index; no independent primary-source confirmation (offer letter, press, company page, colleague) of the role was found, and role dates are inconsistent across sources. Because the role is index/self-reported only and identity of the exact employment record is not independently corroborated, the quant-employment claim is retained as UNRESOLVED rather than CONFIRMED.Sep 2026
• ICPC World Finals 2025 (Baku, 31 Aug-5 Sep 2025): with University of Zagreb team (Toni Brajko, Dorijan Lendvaj, Patrick Pavic; coach Kresimir Malnar) took silver medal, 7th place overall among 140 teams, and the Europe Champion title - the best result in the university's ICPC history.Sep 2025
• Jump Trading is a Chicago-headquartered proprietary trading firm, not a software company - so his LinkedIn-listed Software Engineer Intern role sits directly in the quantitative proprietary-trading sector.2025
• IOI 2023 (Croatia): Toni Brajko won a bronze medal, absolute rank 171; his high-school team included Lara Semes, Ivan Janjic and Fran Babic (XV. gimnazija Zagreb / Gimnazija Lucijana Vranjanina).Sep 2023
• ICPC Central Europe Regional Contest 2024: his Zagreb team won 1st place and gold, which qualified them for the Europe Championship and World Finals; FER published a news item on his performance.Dec 17, 2024
• CEOI 2023 (Magdeburg, Germany, 13-19 Aug 2023): bronze medal among 48 contestants from 11 countries.Aug 19, 2023
• His LinkedIn profile lists a Junior Algorithm Engineer role at Huawei as past experience; Huawei is a technology/telecom company, not a quantitative finance firm, so it is relevant as engineering experience rather than quant employment.
• ICPC ID lists his contact email [contact omitted] and confirms ICPC contest history (2023-2026) for University of Zagreb.2026
• Problemsetter / problems author for the Croatian Informatics Association (HSIN) - organizer of Croatia's national informatics olympiad pipeline - indicates he authored competitive-programming problems alongside his studies.