Aliaksei Filinovich

Belarusian software engineer and competitive programmer. IOI 2019 bronze medalist for Belarus (as 'aleex'), Codeforces grandmaster, and ICPC 2021 World Finalist with Belarusian State University. Bachelor's in Applied Mathematics and Informatics (BSU, 2019-2023) and a Yandex School of Data Analysis master's-level ML/CS program (2021-2023). Career: software engineering internships at EquAI (2020) and Yandex (2021, 2022), full-time Software Engineer at Yandex on the YTsaurus distributed data platform (2022-2023), and since July 2023 Software Engineer in Data Management at Pinely, an algorithmic/HFT proprietary trading firm in Amsterdam.

Notes11

• Quant employment verification: CONFIRMED. Identity is supported: the LinkedIn profile (index-only) shows Software Engineer at Pinely from 2023-07, and the same competitive-programming identity ('aleex' / Aleksei Filinovich) is independently anchored by the official IOI record and Codeforces. Employer classification is supported by primary evidence: Pinely's own website states it is an algorithmic/HFT proprietary trading firm trading its own capital, and its public org page lists Quantitative Researcher roles, so it is a genuine quantitative trading firm - not merely a name containing 'quant'. The role itself is a full-time Software Engineer in Data Management, i.e. an actual engineering role at a quant trading firm; his earlier EquAI (game AI) and Yandex (distributed data platform / assistant backend) roles are not quantitative finance. Caveat: the employment dates/company rest on the LinkedIn-derived index and Pinely's self-description, not on a Pinely-signed attestation.
• LinkedIn (index-only) lists his Pinely role as Software Engineer in Data Management, Amsterdam, from 2023 to present - the 'Data Management' scope is an internal-function label, not a confirmed trading/research title.Jul 2023
• Pinely self-describes as an algorithmic/HFT proprietary trading firm trading its own capital with offices in Singapore, Cyprus and the Netherlands, which classifies it as a quantitative trading employer.
• Pinely's Amsterdam HQ page lists 36 staff including titled 'Quantitative Researcher' and 'Senior Quantitative Researcher' roles, corroborating that Pinely's business is quantitative trading research rather than a generic software company.
• Competed at ICPC World Finals 2021 (Dhaka) with BelarusianSU 3 teammates Anton Paliukhovich and Yafim Klimasheuski, placing 22nd.Nov 2022
• Before Pinely he was a Software Engineer at Yandex (Minsk) on YTsaurus, the distributed big-data platform, 2022-2023 - a systems/data-infrastructure role, not a trading role.2022
• Represented Belarus at IOI 2019 as contestant 'aleex', earning bronze (288.82, rank 119), per the official IOI statistics site.Aug 2019
• The 'YTsaurus - Distributed Big Data Platform' work at Yandex and Pinely's 'Data Management' scope both point to a systems/infrastructure specialization rather than strategy or research authorship.
• Two prior Yandex Software Engineer internships: Virtual Assistant Backend (Minsk, 2021) and an unnamed team (2022), showing a Yandex pipeline of internships before full-time conversion.2021
• His earliest listed role is a 2020 Software Engineer internship at EquAI (equai.xyz), Minsk, described as Game AI Infrastructure - a game-AI startup, not a quantitative finance employer.2020
• Codeforces handle 'aleex' is the one linked from the official IOI participant page, tying the competitive-programming identity to the name Aliaksei Filinovich (the same handle appears as 'Alexey Filinovich' on Codeforces).Aug 2019
• Codeforces account 'aleex' (Alexey Filinovich, Luninyets, Belarus, Belarusian SU) reached max grandmaster rating 2486, evidence of sustained top-tier competitive programming beyond IOI.