Rafael Kristoforus Yanto

Rafael Kristoforus Yanto is a computer science undergraduate at the National University of Singapore (Computer Science with a Second Major in Mathematics, 2023-2027) and a two-time silver medalist for Indonesia at the International Mathematical Olympiad (IMO 2022 and 2023), with an APMO 2022 bronze. He has held software engineering and leadership roles in NUS student organisations (Source Academy, Perhimpunan Indonesia NUS, NUANSA Cultural Production) and worked as a Quantitative Developer Intern at Beavo Investment Pte. Ltd. in Singapore in 2025, building data microservices and ETL pipelines for historical and live market data. Beavo Investment describes itself as applying high-frequency and quantitative trading experience to crypto assets.

Notes5

• Quant employment verification: CONFIRMED. Supporting evidence: (1) role - the LinkedIn profile (via index enrichment) lists 'Quantitative Developer Intern' at Beavo Investment Pte. Ltd., Singapore, June-Dec 2025, with a concrete engineering description (microservices/ETL for historical and live market order data); (2) identity - the same profile links github.com/izruff and matches the IMO/NUS background of the subject; (3) employer classification - Beavo Investment's own site describes high-frequency/quantitative trading in crypto, so it is a genuine quant trading firm and not merely a company with 'quant' in its name. Caveat retained: the internship evidence is indexed LinkedIn data plus the employer's self-description; no independent primary source (a directly-read live LinkedIn page or company confirmation) has corroborated the internship itself.2025
• Identity linkage: the IMO 2022/2023 Indonesia silver medalist (SMAK Penabur Gading Serpong), the linkedin.com/in/rafaelky NUS CS student, and the github.com/izruff account resolve to one person - the LinkedIn profile carries the NUS CS + Beavo internship and links the izruff GitHub, matching the olympiad education timeline.2026
• Quantitative Developer Intern at Beavo Investment Pte. Ltd. (Singapore), 2025: designed microservices and ETL pipelines storing historical data and streaming live market orders, measuring benchmarks (Python/FastAPI, PostgreSQL, AWS, WebSockets, gRPC). This is a real engineering internship, not a student program.2025
• IMO 2022 silver (rank 61/589, total 32) and IMO 2023 silver (rank 82/618, total 29) representing Indonesia; APMO 2022 bronze (rank 134/309, total 16). The IMO 2023 contest was held in Chiba, Japan, 2-13 July.Jul 13, 2023
• Beavo Investment's own website states it applies 'high-frequency and quantitative trading experience from traditional financial assets to cryptocurrencies' and is staffed by 'quantitative portfolio managers from leading hedge funds', which classifies it as a quantitative/crypto trading firm rather than a name-only match.2026
• Employer classification check: Beavo Investment Pte. Ltd. (Singapore, beavoinvest.com) describes itself as applying high-frequency/quantitative trading to crypto assets with a team of ex-hedge-fund portfolio managers, so the Quantitative Developer Intern role is a genuine quantitative trading firm - not a name-only 'quant' match.2026
• Two consecutive IMO silver medals while still a high-school student at SMAK PENABUR Gading Serpong (2020-2023) is a top-tier national olympiad record and is the strongest public signal of elite mathematical ability in the profile.Jul 18, 2023
• Source Academy Student Software Engineer (2024): contributed to the NUS CS1101S course platform and built the 'Sessions' collaborative-editing feature on a conflict-free replicated data type (CRDT) - a distributed-systems engineering project, not coursework.2024
• Education: SMAK Penabur Gading Serpong (Mathematics and Natural Sciences, 2020-2023) then National University of Singapore, Bachelor's in Computer Science with a Second Major in Mathematics (2023-2027), i.e. he entered NUS directly after high school.2023
• Two successive roles in Perhimpunan Indonesia NUS (PINUS) - Junior Developer (2024) then Senior Developer (2024-2025) - and Technical Director at NUANSA Cultural Production (2024-2025) place him in the leadership layer of the Indonesian student community at NUS.2025
• Devpost portfolio under the handle izruff lists SGBusRun, a bus-tracking hackathon project - the clearest evidence of independent build activity outside coursework and student-org roles.2024