Fabian Hiller is a founding engineer and prolific open-source maintainer based in New York with eight years of experience building developer-facing libraries and consumer web products. He created Valibot and Formisch, co-created Standard Schema, and runs projects that together exceed 120 million monthly npm downloads, with sponsorship from companies like Vercel and DigitalOcean. Fabian blends product-focused startup experience—from CTO and CEO roles to founding engineering at a stealth startup—with hands-on front-end work, notably improving UI and routing for the modular-forms library used across SolidJS, Qwik and Preact. He holds advanced CS studies at Pace and a background in mobile media from Stuttgart, and often pairs educational content creation with production-grade engineering, reflecting a rare mix of community impact and practical product delivery.
8 years of coding experience
5 years of employment as a software developer
Master of Science - MS, Computer Science, Master of Science - MS, Computer Science at Pace University
Bachelor of Science - BS, Mobile Medien (Software development and design), Bachelor of Science - BS, Mobile Medien (Software development and design) at Hochschule der Medien Stuttgart
The modular and type-safe form library for SolidJS, Qwik and Preact
Role in this project:
Front-end Developer
Contributions:133 releases, 13 reviews, 130 commits in 3 months
Contributions summary:Fabian primarily contributed to the website component of the modular-forms repository, focusing on improving the user interface and experience. They fixed client-side routing issues, restructured the API reference navigation, and addressed several bugs in the website's components. Furthermore, the user refactored and extended several components, added new icons, and implemented various enhancements like hover animations, demonstrating a strong focus on front-end development and UI improvements.
The modular and type safe schema library for validating structural data 🤖
Contributions:100 releases, 165 reviews, 386 PRs in 1 year 8 months
bundle-sizemodularparsingruntimetype-safe
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