Tia Shi Wei

Tia Shi Wei (also known online as 'maomao90' / devpost 'tiashiwei04') is a Singapore competitive programmer and IOI 2023 gold medalist. She ranked 23rd of 350 at IOI 2023 with 349.5/600, representing Singapore, and holds a peak Codeforces rating of 2701 (International Grandmaster). She was schooled at NUS High School of Mathematics & Science, earning the NUS High Diploma with High Distinction (2018-2023), and completed a non-graduating advanced placement programme in Mathematics and Computer Science at the National University of Singapore (2022-2023). She has completed quantitative-finance internships at MS Capital Singapore (Meridian & Saturn Capital, a systematic-alpha fund) and Virtu Financial (a global market maker), and previously served national service in the Singapore Police Force.

Notes15

• Quant employment verification: CONFIRMED. Supported role/internship evidence: two verified employers in quantitative finance, both Singapore-based. (1) Virtu Financial - quantitative trading / market-making firm (Virtu.com: deep liquidity and competitive bids/offers across 25,000+ securities; Wikipedia: American market-making firm, Nasdaq: VIRT, S&P 500). Roles: Quantitative Trader Intern (2026) and Strategy Developer Intern (2026-, marked current) per the LinkedIn profile/enrichment index; The Org's Virtu 'Strategic Development' team page (index/aggregator) lists 'Tia Shi Wei - Strategy Developer Intern'. (2) MS Capital Singapore = Meridian & Saturn Capital Pte Ltd - systematic-alpha quant fund (mscapital.sg: 'institutional investment platform deploying systematic strategies across China A-shares and global markets', MAS CMS licensed, est. 2016). Role: Quantitative Researcher Intern (2025, Nov-Dec per lead), with a role description covering a cross-sectional ETF strategy and US-futures time-series research in a Polars pipeline. Identity is supported: the LinkedIn headline matches the IOI 2023 gold / Codeforces identity, and the Codeforces 'maomao90' profile names 'Tia Shi Wei, Singapore'. Caveats: employment dates/titles for the Virtu and MS Capital internships rest on LinkedIn-enrichment (index/aggregator) data plus a The Org team listing, not on an employer-published primary source; student-style program content is not the basis of this confirmation - the basis is recorded internships at genuine quant employers. No bank/asset-manager; the quant roles are at a market maker and a systematic fund.
• Quant employment (GREATEST DATE CERTAINTY): Virtu Financial - Quantitative Trader Intern, Singapore, dated 2026 (per LinkedIn enrichment/index); the richer lead dates it Jan-Feb 2026.Jan 2026
• Quant employment: MS Capital Singapore - Quantitative Researcher Intern, dated 2025; the richer lead dates it Nov-Dec 2025. The role description states she developed a cross-sectional ETF strategy from daily close/volume data and ran time-series research on U.S. futures in a Polars-based pipeline.Nov 2025
• Tia Shi Wei won a gold medal at IOI 2023 (Singapore), ranking 23rd of 350 with 349.5/600 - placing her in the top ~6.6% of contestants.Sep 2023
• Verified identity: the LinkedIn profile (tia-shi-wei-216a7326a) headline reads 'IOI Gold Medalist (2023) | Codeforces International Grandmaster | Incoming Computer Science Global Merit Scholar at NUS', tying the LinkedIn to the IOI/Codeforces identity.
• Quant employment: Virtu Financial - Strategy Developer Intern, Singapore, dated '2026-' and flagged is_current in LinkedIn enrichment; The Org's Virtu 'Strategic Development' team page also lists 'Tia Shi Wei - Strategy Developer Intern' (this is an index/aggregator listing, not primary confirmation).2026
• Codeforces handle 'maomao90': profile states the name 'Tia Shi Wei, Singapore', organization National University of Singapore, peak International Grandmaster rating 2701 (current 2275) - an independent cross-link confirming the handle.
• Employer classification - Virtu Financial: confirmed quantitative trading/market-making firm. Virtu.com: 'combine our market structure expertise and execution technology to provide deep liquidity and competitive bids and offers in over 25,000 securities, at over 235 venues.'
• Employer classification - MS Capital Singapore = Meridian & Saturn Capital Pte Ltd: confirmed systematic trading fund. Its site: 'Meridian & Saturn Capital is an institutional investment platform deploying systematic strategies across China A-shares and global markets', MAS CMS licensed, Est. 2016, offices Singapore/Hong Kong/Shanghai.
• Recency: the newest dated evidence is the 2026 Virtu internship; the 'Strategy Developer Intern, 2026-' entry is marked current in the LinkedIn/index data - but that is an index claim and current employment is not independently confirmed for Sept 2026.2026
• Education: NUS High School of Mathematics & Science, NUS High Diploma (High Distinction), honours in Computer Science with majors in Mathematics, Physics and Chemistry, 2018-2023.2023
• Labeled an 'Incoming Computer Science Global Merit Scholar at NUS' in her own LinkedIn headline as of this run - an incoming scholarship award status, not a completed degree, and NUS enrollment is not otherwise confirmed by a primary NUS source.