Jonathon Sun

Jonathon Sun is a New Zealand computer science student, currently at the University of Cambridge (Computer Science), previously at the University of Auckland. He was a member of New Zealand's IOI 2023 team as a Rangitoto College Year 13, earning an honourable mention at the contest in Szeged, Hungary. He was on the winning Rangitoto school squad at NZPC 2023. His LinkedIn lists Jane Street's First Year Trading & Tech Program and Discover Citadel (both student programs), a fellowship at Non-Trivial, and co-chair of the Upper Harbour Youth Council; a search-indexed version of his LinkedIn headline shows 'SWE Intern @ Citadel'. Employment-lineage claims here are index/search-derived unless a primary source is cited.

Notes6

• Quant employment verification: UNRESOLVED. The only evidence of Jane Street is the 'First Year Trading & Tech Program' (a student program, which does not qualify) plus an untitled 'Jane Street' caller listing. Citadel appears as 'Discover Citadel' (a student insight program, non-qualifying) and as 'SWE Intern' in a search-indexed LinkedIn headline. Jane Street and Citadel (via Citadel Securities) do operate in quantitative trading/market-making. Identity is supported (Cambridge CS + NZ IOI 2023 matches the target profile), but no primary source directly confirms a quant internship, and the SWE-intern claim rests on a search snippet rather than the profile page itself - so the status is UNRESOLVED pending direct confirmation.
• Represented New Zealand at IOI 2023 (Szeged, Hungary) as a Rangitoto College Year 13 and received an honourable mention, alongside Phoebe Zhang who won bronze.Sep 2023
• A Google-indexed version of the LinkedIn headline reads 'Jonathon Sun - SWE Intern @ Citadel | CS @ Cambridge', which points to an actual Citadel software-engineering internship rather than a student program - the strongest quant-relevant employment signal found, though only at search-snippet level.
• CAUTION (index-only): the enrichment index lists the employer as Jane Street, but this may be stale and derives from the same student-program listing - current employment must not be inferred from it.
• Jane Street 'First Year Trading & Tech Program' (Apr 2025) is a student program, not an internship or full-time role; sourced only from index/caller lead.Apr 2025
• Named to New Zealand's four-person IOI 2023 team (with Anatol Coen, GuanHan Li, Phoebe Zhang); listed as Rangitoto College.May 13, 2023
• Citadel 'Discover Citadel' (Mar 2025) is a student insight/exploration program, not employment; index/caller-listed.Mar 2025
• IOI statistics profile confirms Jonathon Sun competed for New Zealand in 2023 with no medal (honourable-mention tier).2023
• Education: Computer Science at the University of Cambridge (index/aggregator listing only - not primary-source confirmed).
• Won the school-squad category of NZPC 2023 with Rangitoto College teammates Luke Bartram and Phoebe Zhang (156 points).Aug 19, 2023
• Previously studied Computer Science at the University of Auckland (index/aggregator listing only).
• Secondary school: Rangitoto College (independently confirmed by the NZOI team announcement).May 13, 2023