Stanisław Barzowski

Polish computer scientist and software developer. Competed for Poland at IOI 2014, where he won a bronze medal. Studied Computer Science at the University of Warsaw (BSc 2014-2017, MSc 2017-2019). Worked as a software engineer at Google (Zürich) and previously as a Google intern, and is a committer on the jsonnet configuration language. LinkedIn lists his current role as Software Developer at XTX Markets, London, from July 2021.

Notes7

• Quant employment verification: CONFIRMED. Stanislaw Barzowski holds a software development role at XTX Markets, a London-headquartered electronic market maker / quantitative trading firm; employment at XTX is independently attested by Software Engineering Radio episode 570 (June 2023), which describes him as 'of XTX Markets and a committer on the jsonnet project', and by his GitHub/XTX Markets committer activity. Employer classification: XTX Markets is a genuine quantitative trading / market-making firm (founded 2015), so this is an actual role at a quant-finance employer, not a student programme, insight day, camp or scholarship. The specific job title 'Software Developer', the London location and the July 2021 start date remain index-only (asserted via the LinkedIn profile as surfaced by a third-party index), so the role title and start date are not independently confirmed, though the fact of employment at XTX is. No past internship or role at another quantitative-finance employer was found; the pre-2019 roles on record are Google engineering (employee and intern) and Polish software/R&D roles.Jun 27, 2023
• Identity confirmed across independent sources: the GitHub account sbarzowski (name 'Stanisław Barzowski', location London) links the same person who is an XTX Markets committer and jsonnet project committer, so the IOI competitor, the jsonnet developer, and the XTX employee are one identity.2024
• Employer classification: XTX Markets is a London-headquartered quantitative trading firm / electronic market maker (founded 2015), so a Software Developer role there is a genuine quantitative-finance employment, distinct from a student programme or insight event.2024
• Public technical voice: appeared on Software Engineering Radio episode 570 (June 2023) discussing the jsonnet language, described as 'of XTX Markets and a committer on the jsonnet project'; this is a primary confirmation that his employer at that date was XTX Markets.Jun 27, 2023
• Career timeline per LinkedIn (index-only): Google Software Engineer in Zürich 2019-2021; Google Software Engineering Internships in Boulder, Colorado (2018) and Greater New York City (2017); Software Engineer in R&D at IIIT 'Innovation In IT' in Warsaw 2016-2017; Technical Lead / Software Engineer at Quantitative Engineering Design; Software Engineer at Coretechnology; Algorithmic Task Author / Software Engineer at Stowarzyszenie Talent.2021
• Bronze medal at IOI 2014 (Taipei): Gazeta Gdynia reports 'Stanisław Barzowski brązowym medalistą Olimpiady Informatycznej w Taipei' (Stanisław Barzowski bronze medalist at the IT Olympiad in Taipei), the Olympiad identity named in the brief.2014
• Open-source: committer/contributor on the jsonnet configuration language (google/jsonnet), and author of the sbarzowski repos jsonnet-modifiers, muesli, dir2json and jsonnet-parser-combinators.2023
• Education (index-only): Master's degree in Computer Science, University of Warsaw (2017-2019), and Bachelor's degree in Computer Science, University of Warsaw (2014-2017). No independent university page naming him was found.2019
• Competitive-programming record includes the Polish Olympiad in Informatics (OI) national stage and IOI 2014; the Gdynia/Talent youth-programme pages show him in Polish OI/informatics circles before university.2014