Zino Hofmann
Co-founder CTO at Zino & Co. Fund B.V.
Amsterdam, North Holland, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolZino Hofmann is a pragmatic tech entrepreneur and CTO based in Amsterdam with nine years of commercial experience and a 14-year background in competitive programming and STEM competitions. He co-founded Expatfile, architecting IRS e-file capable tax automation that turns complex expat returns into a 10-minute DIY flow, and has led engineering for startups and clients through Zino & Co., delivering low-latency trading systems, real-time loyalty apps, and sub-30ms tax calculations. A hands-on full-stack developer, he’s an active open-source contributor—notably improving caching, polling, and query handling in a GraphQL Flutter client—to ensure robust data integrity across mobile and backend layers. Combining AI and computer science studies with product-first consultancy and startup investing, he blends deep algorithmic skill with practical system design to scale high-performance platforms.
10 years of coding experience
2 years of employment as a software developer
Bachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at Vrije Universiteit Amsterdam (VU Amsterdam)Bachelor of Applied Science - BASc Communication & Multimedia Design, Bachelor of Applied Science - BASc Communication & Multimedia Design at Amsterdam University of Applied SciencesHigh School Senior General Secondary Education, High School Senior General Secondary Education at Gerrit van der Veen CollegeBachelor of Science - BS Artificial Intelligence, Bachelor of Science - BS Artificial Intelligence at University of Amsterdam
Dutch, English
Github Skills (16)
graphql10
caching10
webclient10
flutter-game10
dart10
widgets10
wordpress-graphql10
clientside10
wpgraphql10
flutter-apps10
flutter10
api-design9
data-structure9
data-structures9
timer8
Programming languages (1)
Github contributions (5)
zino-hofmann/graphql-flutter
Jun 2018 - Aug 2019
A GraphQL client for Flutter, bringing all the features from a modern GraphQL client to one easy to use package.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:22 commits, 18 PRs, 15 pushes in 1 year 1 month
Contributions summary:Zino made significant contributions to the GraphQL client for Flutter, primarily focusing on improving the caching mechanism and query handling. They refactored the cache implementation, switching from `Map` to `HashMap`, and addressed exception caching to ensure data integrity. Additionally, the user implemented polling mechanisms and improved timer logic within the query widgets for more reliable data fetching and updates. These changes involved modifications to both the cache and the widget components, showcasing a full-stack approach.
fluttergraphql-clientdartgraphql
eusdima/trading-bot-rs
Apr 2026 - Apr 2026
Contributions:1 PR, 170 pushes, 6 branches in 7 days
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.