James Duffy
CEO at Epictetus Ventures
Seoul, South Korea
Summary
🤩
Rockstar🎓
Top SchoolJames Duffy is a serial entrepreneur and operator with 12 years of experience building e-commerce, content-driven, and blockchain ventures from Korea and beyond. As CEO of Epictetus Ventures he invests in and scales profitable online businesses, having previously founded a direct-to-consumer Korean red ginseng brand and one of Korea’s largest English job portals. He blends hands-on technical chops—contributing full‑stack lesson content to the popular CryptoZombies learning repo and building a profitable crypto arbitrage bot—with strategic marketing and branding that propelled two companies to seven-figure exits. Comfortable bridging product, growth, and engineering, he has led teams across marketplaces, payments and international e‑commerce. Based in Seoul with a math degree from Virginia Tech, he pairs analytical rigor with pragmatic customer-focused growth tactics.
12 years of coding experience
5 years of employment as a software developer
Bachelor of Science (B.S.), Mathematics, Bachelor of Science (B.S.), Mathematics at Virginia Tech
Korean, English
Github Skills (5)
smart-contracts10
solidity10
blockchain10
web3js9
front-end-development8
Programming languages (5)
Github contributions (5)
CryptozombiesHQ/cryptozombie-lessons
Dec 2017 - Mar 2018
Lesson content for cryptozombies.io
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:88 commits, 9 PRs, 8 pushes in 2 months
Contributions summary:James primarily focused on modifying and adding content for the lessons within the cryptozombies.io repository. Their commits involved refactoring lesson code, renaming files, adding new lessons, and splitting existing ones. The changes include modifications to the lesson index and markdown files, showcasing work related to lesson structure, content updates, and adding new lessons to the learning path.
cryptozombiescryptographycryptocurrencycrypto
delusive/spree_variant_options
Apr 2014 - Nov 2014
Contributions:58 commits in 6 months
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