Jonathan Irvin Gunawan

Jonathan Irvin Gunawan is an Indonesia-born software engineer based in Singapore. He represented Indonesia at the International Olympiad in Informatics in 2012 (bronze) and 2013 (silver), and competed as jonathanirvings in competitive programming (Codeforces, Topcoder, AtCoder). He studied Computer Science with a minor in Mathematics at the National University of Singapore. A LinkedIn-derived index lists roles at Google (Software Engineer, 2017-2020; two earlier internships), Jump Trading LLC (Quantitative Developer 2020-2023, Software Engineer 2023), Sorabel by Sale Stock (Data Scientist, 2017) and a current role at Meta (Singapore) from 2024; these role/date entries originate from the index and were not independently confirmed by a primary source in this run. He is also a former World Cube Association competitor.

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• Identity chain: personal site jonathanirvin.gs links to LinkedIn (sg.linkedin.com/in/jonathanirvings), GitHub, Twitter/X and Codeforces under the handle 'jonathanirvings', tying the Olympiad/competitive-programming identity to the professional profile.Sep 17, 2026
• Quant employment verification: UNRESOLVED. The identity is well supported (personal site cross-links the LinkedIn/GitHub/X/Codeforces handles, and the IOI/competitive-programming record is consistent), and the index shows an actual quant-finance role at Jump Trading LLC, an American proprietary trading and market-making firm. However every employment record here (Jump Trading 2020-2023, Meta 2024-, Google, Sorabel, NUS TA) comes solely from a LinkedIn-derived enrichment index and was not independently corroborated by a primary source (no accessible LinkedIn page — firecrawl returned 403 — and no press/company page naming the role). Per the primary-source bar this is not CONFIRMED; identity supported, employment classification (Jump Trading = quant trading/market-making) supported, but employment evidence is index-only.Sep 17, 2026
• Index lists Quantitative Developer at Jump Trading LLC (Singapore) 2020-2023. Jump Trading is an American proprietary trading and market-making firm (Wikipedia), so this role is in quantitative finance; the role itself is index-only, not corroborated by a primary source.2023
• Represented Indonesia at IOI 2013 and won a silver medal; CPHOF timeline lists IOI 2012 bronze and IOI 2013 silver.2013
• Represented Indonesia at IOI 2012 and won a bronze medal (stats.ioinformatics.org contestant record).2012
• Enrichment index (LinkedIn-derived) lists a CURRENT role as Software Engineer at Meta, Singapore, from 2024; this is an index-only claim, not independently confirmed by a primary source in this run.2024
• Index lists Software Engineer at Jump Trading LLC, Singapore, 2023 (a second, distinct title at the same firm). Index-only.2023
• Index lists Software Engineer at Google (Singapore) 2017-2020, following two summer internships at Google/Alphabet (2015 Google Fiber Analytics, 2016 YouTube advertising infrastructure) while a student. Index-only.2020
• Education: Bachelor's degree in Computer Science with a Minor in Mathematics, National University of Singapore (index); CPHOF also lists NUS as his university. High school: SMAK 1 BPK PENABUR Bandung, Indonesia.
• Published contact email [contact omitted] is listed on his IOI statistics profile page.
• Listed on the ICPC Asia Pacific Championship 2026 committee page, showing current involvement in competitive-programming community organisation.2026
• Named on the scientific committee/organiser page of Ngoding Seru, an Indonesian competitive-programming training event, alongside other Indonesian Grandmasters.Dec 18, 2018