Encho Mishinev

Bulgarian software engineer and competitive programmer. IOI contestant for Bulgaria 2013-2017 (gold 2014, 2017; silver 2013, 2015, 2016). Educated at the University of Cambridge (2017-2020). Career: part-time developer at Musala Soft (2017-2018), Leanplum (intern 2018, engineer 2020-2021), QuantCo engineer (2021-2022), GSA Capital intern in London (2019). Index records list a current role as Quantitative Technologist at Radix Trading LLC, Amsterdam, from March 2023.

Notes8

• Quant employment verification: CONFIRMED (with index caveat). Encho Mishinev's identity is supported by the IOI record (stats.ioinformatics.org/people/3078) and cross-linked Codeforces/TopCoder 'Enchom' accounts. Two candidate employers are genuine quantitative-finance firms and are corroborated as such by primary/encyclopedic sources: GSA Capital (Wikipedia: British quantitative investment firm, 'Global Statistical Arbitrage', spun out of Deutsche Bank 2005) and Radix Trading LLC (Wikipedia: proprietary trading firm founded 2012; radix site: research firm monetized through trading). His employment AT them is stated only by the LinkedIn index record (Quantitative Technologist at Radix Trading LLC, Amsterdam, from March 2023; Intern at GSA Capital, London, 2019) — no independent primary source yet corroborates the roles themselves, so they are index-only claims. QuantCo (2021-2022) is a data/software company for insurance, not a trading firm, so that role is not a quant-finance role despite the name. No non-employment quant activity (competitions, insight days, camps) was found. Overall: the employer classification is confirmed, the individual's employment is supported by a single index record and not independently confirmed.2026
• IOI record (stats.ioinformatics.org) confirms Encho Mishinev represented Bulgaria at IOI 2013-2017: gold 2014 (10th/311, 502) and 2017 (7th/304, 428.06); silver 2013 (52nd), 2015 (36th), 2016 (50th). Primary source, not an index.2017
• GSA Capital is a genuine quantitative investment firm ('Global Statistical Arbitrage', spun out of Deutsche Bank 2005); his 2019 GSA Capital intern role is therefore a quant-finance internship, though sourced only to the index.2026
• Radix Trading is a proprietary trading firm founded 2012; his listed Quantitative Technologist role is at a quant firm, but the role rests on the LinkedIn index record alone.2026
• QuantCo (quantco.com), where he was a Software Engineer 2021-2022, is a data/software company for insurance and finance, not an investment/trading firm; the 'Quant' in its name does not make the role a quant-finance role.2026
• Winner of the CodeIT programming contest by Musala Soft (reported 2023); he earlier worked part-time at Musala Soft (2017-2018) developing tasks for CodeIt.Jun 2023
• Press (novinite, 2015) identifies him as a tenth-grade student at the High School of Mathematics 'Atanas Radev' in Yambol at the time of his 2015 IOI silver medal, matching the same IOI identity.2015
• Codeforces and TopCoder handles 'Enchom' are linked from the IOI profile page, corroborating the competitive-programming identity across platforms.2026
• LinkedIn record places his University of Cambridge study at 2017-2020, immediately after his final IOI (2017). Index-only.2026
• CPHOF profile shows prize money ~$2302.97 and a Google Hash Code 2021 silver finish in its contest timeline.2026