Timofey Fedoseev

Russian competitive programmer and mathematics/CS student. IOI 2021 gold medalist (Russia) and ICPC World Finals 2023 gold medalist; All-Russian Olympiad in Informatics 2021 absolute winner. B.Sc. Mathematics and Computer Science, Ecole Polytechnique (2022-2025), after a first year at HSE University Moscow. Summer 2024 research fellow at INSAIT on LLM mathematical reasoning. Records listing 'Quantitative Researcher' stints at pinely (2022) and GSA Capital (2023) are index-only and not independently corroborated.

Notes10

• Quant employment verification: UNRESOLVED. Identity is independently supported (OpenReview polytechnique.edu email plus matching LinkedIn, INSAIT page, HSE NERC team page), and both candidate employers are genuinely quantitative-trading firms (GSA Capital = London systematic manager; pinely = HFT proprietary firm). However, the only evidence that he himself held the GSA Capital and pinely 'Quantitative Researcher' roles is the LinkedIn-derived index; no independent primary source confirms either stint, and role type/dates are unstated beyond the index. Employment therefore cannot be confirmed and uncertainty is retained.Sep 2026
• Employment record listing 'Quantitative Researcher' at pinely (Jun-Aug 2022) and at GSA Capital (Jul-Sep 2023) comes solely from the LinkedIn-derived index; no independent primary source (career page, press, or a second profile) corroborates either stint, so both are index-only and their role type (internship vs full-time) is unstated.Sep 2026
• OpenReview profile lists a confirmed polytechnique.edu email, Ecole Polytechnique undergraduate 2022-2025, and the same LinkedIn URL - independently cross-linking three separate identity records to one person.Sep 2024
• IOI 2021 gold medalist representing Russia (absolute rank 64 of the 2021 cohort), per the official IOI statistics archive.Jun 2021
• All-Russian Olympiad in Informatics 2021 absolute winner and ICPC World Finals 2023 gold medalist; the INSAIT fellowship listing states both alongside the IOI gold.Jul 18, 2024
• Employer classification: GSA Capital is genuinely a quantitative firm - it stands for 'Global Statistical Arbitrage', is a London systematic/market-neutral manager founded 2005 out of a Deutsche Bank team, and won the 2023 EuroHedge long-term Equity Strategies award.2023
• Named on HSE University's NERC ICPC 2022 winning team 'Undertrained+Overpressured' (with Ivan Safonov and Maxim Gorokhovsky), corroborating the HSE enrollment and the ICPC record from an independent institutional source.Apr 19, 2022
• Summer 2024 INSAIT Summer Undergraduate Research Fellow on 'Solving Mathematical Problems with LLMs', one of 21 selected students; INSAIT lists him under Ecole Polytechnique.Jul 19, 2024
• Education path changed institutions after year one: B.Sc. Applied Mathematics and CS at HSE Moscow (2021-2022) then transferred-equivalent restart at Ecole Polytechnique (2022-2025), i.e. a two-year French cycle entered after the first Russian year.Jul 18, 2024
• Employer classification: pinely (pinely.com) is a proprietary high-frequency/ultra-low-latency algorithmic trading firm across Singapore, the Netherlands and Cyprus; its Codeforces announcement confirms the same firm, so the name's homonym risk is resolved for the quant-trading reading.Jul 2022
• The Logic.py constrain-solver paper surfaced under a name search is authored by Kesseli, O'Hearn and Cabral - Fedoseev is not an author, and his OpenReview profile lists no publications, so there is no confirmed published paper to attribute to him.Feb 17, 2025
• Competitive-programming handles are Codeforces 'dyrbulshchyl' and AtCoder 'fedoseev_timofey'; the CP Hall of Fame credits a $2,600 total prize and a Google Code Jam 2021 15th-place finish, indicating international-contest standing beyond the IOI medal.2021