Tamio-Vesa Nakajima

Tamio-Vesa Nakajima is a Romanian computer scientist from Beiuș, Oxford-trained in the theory of computing and now a Research Fellow at Philipps University Marburg. He earned an MCompSci (1st class) at University College, Oxford (2017-2021) and a DPhil at Trinity College, Oxford (2021-2025) on Promise Constraint Satisfaction Problems under Stanislav Živný. He represented Romania at IOI 2017 (gold medal) and later served as Romania's Deputy Leader at IOI 2023. Beyond academia he lists software-engineering internships on LinkedIn, including Jane Street and AWS, though neither is corroborated by an independent source found in this run. He also composes classical music.

Notes1

• Quant employment verification: UNRESOLVED. Identity is supported (personal site tamionv.ro, GitHub tamionv, ORCID 0000-0003-3684-9412 cross-link the same person), but the only quantitative-finance employment evidence is a LinkedIn-index enrichment entry listing 'Software development intern at Jane Street' 2020-07 to 2020-09; that index-only record was not independently confirmed by a primary source (no Jane Street page, personal site or press item verified it). Jane Street is correctly classified as a quantitative trading firm (market-making/proprietary trading), so the employer classification is valid, but without independent confirmation of the role it is not CONFIRMED. The AWS 'SDE Intern' entry is likewise index-only and is a software role, not quantitative finance.Jul 2020
• Publishes personal email [contact omitted] on his own site, alongside ORCID 0000-0003-3684-9412.
• Research Fellow at Philipps University Marburg from 2025-11-03, Mathematics & Informatics, in the group of Sebastian Wild; ORCID lists verified email domains ox.ac.uk and uni-marburg.de.
• LinkedIn-index enrichment lists a 'Software development intern at Jane Street' role plus an 'SDE Intern at Amazon Web Services (AWS)' role; both are self-reported profile data (index-only), not corroborated by any independent Jane Street, AWS, or press source found.
• IOI 2017 gold medal representing Romania: rank 15/304, aggregate score 389.52/600; this is the olympiad identity referenced in the brief.Aug 4, 2017
• DPhil in Computer Science at Oxford, 2021-2025, Trinity College, supervised by Standa Zivny; thesis 'Promise Constraint Satisfaction Problems' (published via ORA).
• MCompSci (1st class) in Computer Science, 2017-2021, University College, Oxford.
• Won the ACP Doctoral Research Award for his doctoral thesis, announced by the Oxford CS department.
• Co-author of 'Virtual-Memory Powersort' (with Finn Moltmann and Sebastian Wild), a space-efficient adaptive mergesort; marks the shift from constraint-satisfaction theory to algorithms/data structures after the DPhil.
• Co-author of 'Rooting Out Entropy: Optimal Tree Extraction for Ultra-Succinct Graphs' (with Ismaili Alaoui, Namrata, Sebastian Wild), arXiv, submitted 15 Mar 2026 - continuing data-structures work with the Marburg group.Mar 15, 2026
• Author (with Stanislav Zivny) of 'Linearly Ordered Colourings of Hypergraphs', ACM Transactions on Computation Theory, Vol 14 No 3-4, Feb 2023.Feb 2023
• Returned to the IOI as Deputy Leader for the Romania delegation at IOI 2023, an official team role rather than a contestant one.2023