Radu Lecoiu

Harvard mathematics and statistics undergraduate; three-time Romanian IMO team member (2021 bronze, 2022 and 2023 silver); Putnam 2025 honorable mention. Student programs at Jane Street (2024) and Citadel Securities (2025); LinkedIn-listed Algo Developer Intern at Hudson River Trading (2026).

Notes4

• Quant employment verification: CONFIRMED. LinkedIn lists an actual internship - 'Algo Developer Intern' at Hudson River Trading, dated 2026 with no end date - and HRT is a proprietary electronic market-making/algorithmic trading firm, i.e. quantitative finance. Identity is supported: the IMO participant record shows Radu-Andrei Lecoiu competed for Romania (2021-2023) and the LinkedIn profile is the same person (Romanian, Harvard mathematics). The role is self-reported on LinkedIn (index-sourced), not externally corroborated. The Citadel Securities Quant Invitational (2025) and Jane Street First Year Trading and Technology Program (2024) are student programs/competitions, not employment, and do not by themselves qualify.2026
• International Mathematical Olympiad record for Radu-Andrei Lecoiu (Romania): 2021 bronze, 15 pts, rank 180; 2022 silver, 30 pts, rank 84; 2023 silver, 30 pts, rank 71. This is the primary-source confirmation of the Olympiad identity in the brief.2023
• Named as a statistics and math concentrator '26 on Harvard's third-place 2025 Putnam team, with an honorable mention and top-100 individual rank (December 2025 exam). Note the class year '26 conflicts with the LinkedIn education dates 2023-2027; the discrepancy is unresolved.Mar 23, 2026
• LinkedIn lists 'Algo Developer Intern' at Hudson River Trading with dates '2026' (no end date), consistent with a May 2026 start; the current date is 2026-09-17, so this is the most recent role listed. Index-only claim from LinkedIn enrichment.2026
• Harvard University enrollment August 2023 to May 2027 (4 yrs), Bachelor of Arts in Mathematics and Statistics; prior schooling at International Computer High School of Bucharest (2019-2023).2023
• Teaching Fellow / Course Assistant at Harvard University 2024-2026 (2 yrs): Stat 210 Probability I (Fall 2024), Stat 111 Statistical Inference (Spring 2025, 2026), Stat 244 Linear and Generalized Linear Models (Fall 2025, 2026).2024
• 2023 Romanian local press profile (Municipiul Targoviste) describes him as "the best mathematics student in Romania", gold medalist at the national mathematics olympiad every year from 7th grade, with a scholarship to the International Computer High School of Bucharest after junior Balkan gold. Confirms the Bucharest high-school path.Jan 29, 2023
• Citadel Securities Quant Invitational (2025): selected as one of 22 sophomore students for a week-long competition at Citadel Securities' Miami HQ, with simulated trading scenarios. This is a student competition, not employment.2025
• Jane Street First Year Trading and Technology Program (2024): selected as one of 100 first-year students; program on trading strategies, market-making, risk management, and simulated trading games. This is a student program, not employment.2024
• Co-President of the Harvard Undergraduate Romanian Association 2024-2025.2024