Chris Maddern
Chief Technology Officer at OpenSea
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolChris Maddern is a seasoned technology leader and founder with 14 years of experience building consumer and web3 products, currently serving as CTO of OpenSea in New York. He has a track record of founding and scaling companies—co-founding Button and Rally and leading mobile at Venmo—with deep hands-on experience in mobile, SDKs, and developer tooling. Chris blends product instincts with engineering rigor, evidenced by contributions to open-source projects like DeepLinkKit where he improved route matching and test coverage. He’s comfortable moving between strategy and code, shipping integrations that connect app ecosystems and social wallets alike. Outside work he pursues projects that bridge social experiences and commerce—and he apparently enjoys wine.
14 years of coding experience
14 years of employment as a software developer
BSc Computer Science, BSc Computer Science at University of Bristol
English
Stackoverflow
737reputation
204kreached
12answers
1question
Github Skills (12)
deeplink10
regular-expression10
objective-c10
deep-linking10
ios9
unit-testing9
udid6
xcode6
appstore6
sdk6
crash6
facebook6
Programming languages (12)
Github contributions (5)
button/DeepLinkKit
Jan 2015 - Aug 2019
A splendid route-matching, block-based way to handle your deep links.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:9 releases, 65 commits, 36 PRs in 4 years 8 months
Contributions summary:Chris primarily contributed to the development of a deep linking SDK, focusing on route matching functionality. They implemented regular expression support for matching deep link routes and updated the existing codebase by refactoring and improving its structure. The user also modified the behavior of route parameter precedence and added test cases.
block-basedmatchinglinksroutehandle
floornfts/mobile-minting
Jun 2024 - Mar 2025
Enable instant onchain delivery with in-app purchases. MintTemplates teach Mobile Minting to mint on new platforms.
Contributions:26 releases, 76 reviews, 65 PRs in 8 months
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