Dawid Jamka

Polish competitive programmer (IOI 2018 bronze for Poland; ICPC 2021 World Finals silver with University of Warsaw) and software engineer. Index-only employment history lists internships at Jane Street, NXT Capital BV and Amazon; current employment is not established from the available evidence.

Notes8

• Quant employment verification: UNRESOLVED. Identity is supported (IOI 2018 Poland + IOI-listed Codeforces shadowatyy + University of Warsaw match the LinkedIn/index record), but the two quant-leaning employment leads (Jane Street SWE Intern 2022; NXT Capital BV Intern Software Developer 2021) come only from the LinkedIn/index enrichment, not from a primary company source. Employer classification: Jane Street IS a quantitative trading firm (confirmed, janestreet.com); NXT Capital BV (Amsterdam) describes in-house derivatives trading strategies (a trading firm), separate from the US direct lender of the same name. CONFIRMED requires a real role plus supported identity; student programs alone do not qualify; here the roles are index-only, so classify UNRESOLVED.Sep 2026
• Index-only (ClickHouse/LinkedIn) claim: Software Engineer Intern at Jane Street, London (2022). Not confirmed on a primary Jane Street source; treat as index-only.2022
• Index-only (ClickHouse/LinkedIn) claim: Intern Software Developer at NXT Capital BV, Amsterdam (2021), developing trading infrastructure and strategies for options trading. NXT Capital BV's own company page describes in-house trading strategies/technologies for international derivatives exchanges.2021
• IOI 2018 (Japan): represented Poland, bronze medal, 234/600, absolute rank 120/335; IOI profile lists Codeforces handle shadowatyy.Sep 8, 2018
• NXT Capital BV (Amsterdam, NL) advertises in-house trading strategies and technologies to trade on international derivatives exchanges; this is a distinct firm from the US NXT Capital direct-lending/private-credit business (Orix-owned). NXT Capital B.V. was incorporated in 2019 per Creditsafe, so the 2021 internship postdates formation.2024
• ICPC 2021 World Finals (Dhaka): silver medal, 8th place, University of Warsaw, 8/12 tasks, $6000 team prize; also competed at ICPC 2020 World Finals (Moscow, 14th) and an earlier ICPC World Finals with a different UW team.Nov 10, 2022
• Won 1st place at the XXV Polish Olympiad in Informatics (OI 2017/2018) final and was a 2016/2017 finalist; also a silver medalist at CEOI 2018.2018
• GitHub: github.com/dawidjamka (0 public repos at check) and github.com/shadowatyyy (17 followers, 1 public repo, top language C). Handle matches the Codeforces handle shadowatyy; identity link is name-based only.Sep 2026
• Index-only claim: Software Development Engineer Intern at Amazon (Gdansk, Poland, 2020). Not confirmed on a primary Amazon source.2020
• University of Warsaw, Computer Science; team 'Warsaw Eagles' (with Konrad Paluszek, Lukasz Kondraciuk).2022
• Google Hash Code: 10th (2021) and 23rd (2020) in the world finals stages.2021
• Named in the acknowledgements context of arXiv paper 2110.13711 ('Hierarchical Transformers Are More Efficient Language Models') as a discussant for a University of Warsaw team programming project; the paper text was not retrievable for direct confirmation.Oct 2021