Jonathan Kuperman
Terminal SLDC And Tooling at Ecma International
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolJonathan Kuperman is a senior software engineer and developer advocate with 13 years of experience building developer tools, browser UIs, and infrastructure for companies like Bloomberg, Adobe, Brave, Twitter, and Cloudflare. He currently leads SDLC and tooling efforts at Bloomberg while representing the company at TC39, contributing to language features like signals and source maps. A passionate open-source maintainer and teacher, Jonathan has built educational projects such as a Chrome DevTools course and a web accessibility learning app, and has taught at Frontend Masters. He blends front-end craftsmanship (HTML/CSS/JS) and accessibility expertise with large-scale infrastructure know-how, and is actively reimagining developer workflows for the AI era. An interesting thread through his career is shipping both polished end-user features in creative apps and low-level tooling that improves developer experience across teams.
13 years of coding experience
14 years of employment as a software developer
Computer Science, Computer Science at Eastern Michigan University
Stackoverflow
37reputation
481reached
3answers
1question
Github Skills (25)
accessibility10
javascript10
jquery10
bootstrap10
wai-aria10
css10
ria10
ui-design10
front-end-development10
html10
bootstra10
react10
browser9
lessc8
user-interface8
Programming languages (16)
Github contributions (5)
Rejectedus/rejected.us
Dec 2015 - Feb 2022
:cry: The codebase for rejected.us
Role in this project:
Front-end Developer
Front-end DeveloperContributions:201 commits, 66 PRs, 156 pushes in 6 years 3 months
Contributions summary:Jonathan primarily contributed to the front-end development of the `rejected.us` project, focused on enhancing the user interface. They initiated the basic setup of a Hapi application, introduced the integration of Bootstrap, implemented a responsive layout, and added Google Analytics. Furthermore, they refactored the code to utilize a more modern approach with create-react-app and component-based styling.
codebaserejected
jkup/mastering-chrome-devtools
Feb 2016 - Aug 2021
:fire: Website for teaching Chrome DevTools
Role in this project:Front-end Developer
Front-end DeveloperContributions:92 commits, 8 PRs, 69 pushes in 5 years 6 months
Contributions summary:Jonathan appears to be focused on building the front-end of the Chrome DevTools teaching website. They are primarily working with HTML, CSS, and JavaScript, as indicated by the initial bootstrapping, basic page layout, and the addition of styling and interactive elements. The user incorporated external libraries like Bootstrap and jQuery, indicating a focus on rapid development and user interface components. They also incorporated new pages and a service worker, extending functionality.
chromedevtools
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