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Benjamin Qi

Member of Technical Staff at Anthropic
Anthropic · New York City Metropolitan Area · engineer
LinkedIn · GitHub · github.com
stats.ioinformatics.orgcphof.orgcodeforces.comtopcoder.comopen.kattis.comatcoder.jpcodechef.com
IOI Gold Medalist 2018 And 2019 (USA)Peak Codeforces Rating 3797 (June 2021)Creator/maintainer Of The USACO GuideContributed To MIT ICPC World Finals Team

Competitive programmer and software engineer; IOI 2018 and 2019 competitor representing the USA. Member of Technical Staff at Anthropic (2026-). Previously Quantitative Research Analyst at Citadel Securities (2023-2026) after a Quantitative Developer internship there in 2022.

Benjamin Qi is a competitive programmer who represented the United States at the International Olympiad in Informatics in 2018 and 2019, winning a gold medal both years. He studied at the Massachusetts Institute of Technology and was a dual-enrollment student at Princeton University. His LinkedIn profile (index-only) lists roles as a Quantitative Research Analyst and Quantitative Developer Intern at Citadel Securities and a software engineering internship at Amazon, and a current Member of Technical Staff role at Anthropic.

Details
LocationNew York City Metropolitan Area
Company siteanthropic.com
UniversityMassachusetts Institute of Technology
C++AlgorithmsCompetitive programmingPythonReinforcement learning
Notes
  • Quant employment verification CONFIRMED - Benjamin Qi held quantitative-finance roles at Citadel Securities: Quantitative Developer Intern (2022) and Quantitative Research Analyst (2023-2026). Citadel Securities is a global market maker and systematic trading firm (its own careers page lists Quantitative Research Analyst roles), so both roles are genuine quantitative-trading employment, not a student program. Identity is supported by the matching LinkedIn account (bqi343), which also carries the same competitive-programming background (MIT, Amazon internship). Caveat: the Citadel employment itself is sourceable only from the LinkedIn profile index (aggregator), not an independent primary source; flagged as index-only evidence.
  • CONFIRMED - Benjamin Qi held quantitative-finance roles at Citadel Securities: Quantitative Developer Intern (2022) and Quantitative Research Analyst (2023-2026). Citadel Securities is a global market maker and systematic trading firm (its own careers page lists Quantitative Research Analyst roles), so both roles are genuine quantitative-trading employment, not a student program. Identity is supported by the matching LinkedIn account (bqi343), which also carries the same competitive-programming background (MIT, Amazon internship). Caveat: the Citadel employment itself is sourceable only from the LinkedIn profile index (aggregator), not an independent primary source; flagged as index-only evidence.
  • LinkedIn index lists a current Member of Technical Staff role at Anthropic (2026-) with role description 'RL' (reinforcement learning); index-only claim, not independently confirmed.
  • Authored the USACO Guide (usaco.guide), a widely used curated competitive-programming resource, announced via Codeforces blog entry 80438.
  • LinkedIn index lists a Software Development Engineer Intern role at Amazon (2021); an independent 2021 profile also described him as a Software Engineer Intern at Amazon as of July 2021.
  • Competed for MIT in the ICPC World Finals, Bronze medal (2021); MIT News covered MIT winning ICPC World Finals.

Competition record

United States of America · IOI

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