John Hildenbiddle is a senior UX/UI leader and hands-on front-end engineer with over two decades of experience crafting web and native products across startups and enterprise environments, currently leading design at Brivo after a role at Eagle Eye Networks. He blends systems-oriented design with human-centered engineering to bridge design and engineering teams, build scalable design systems, and improve product development workflows. His background includes transformative work at Nordstrom and F5—delivering the company’s first responsive experiences and a unified UI framework during rapid growth phases. An active open-source contributor, he maintains popular front-end utilities like docsify-themeable and a CSS variables ponyfill, with particular attention to legacy browser compatibility. Based in Austin, he pairs servant leadership and player-coach sensibilities to foster collaborative, empathetic teams that ship high-impact products.
10 years of coding experience
25 years of employment as a software developer
BA, Media Arts, BA, Media Arts at University of South Carolina
Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers
Role in this project:
Front-end Developer
Contributions:3 reviews, 492 commits, 17 PRs in 4 years 11 months
Contributions summary:John contributed to the development of a client-side library for handling CSS custom properties, also known as "CSS variables," across various browsers. Their work involved implementing features and fixing bugs related to the core functionality, and testing the components. The user updated the code, fixed bugs in IE 9 & 10, implemented support for user-provided variables, and improved the performance of incremental updates.
A delightfully simple theme system for docsify.js. Features multiple themes with rich customization options, an improved desktop and mobile experience, and legacy browser support (IE11+).
Role in this project:
Front-end Developer
Contributions:293 commits, 8 PRs, 155 pushes in 5 years 2 months
Contributions summary:John primarily focused on enhancing the user interface and improving the overall user experience of the docsify-themeable project. Their contributions included the implementation of new features, such as support for docsify-tabs and the addition of GitHub buttons. They also made various styling updates, including fixes for zoom image and search layout to improve the visual presentation and usability of the documentation. Furthermore, they addressed compatibility issues, especially for legacy browsers like IE11+.
browser-supportmobiledocsifythemesproperties
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