Keith Clark
Senior Frontend Developer at Good Life Plus PLC
United Kingdom
Summary
👤
Senior🎓
Top SchoolKeith Clark is a Senior Frontend Developer with 15 years of experience crafting performant, accessible web applications and component libraries for large-scale platforms and agencies. He combines deep mastery of core web APIs (DOM, Web Workers, Canvas, WebGL, Web Components) with practical experience across frameworks—Angular, React, Vue, Svelte—and the ability to build framework-free solutions that adhere to WCAG. At Venntro/Ambervine he shipped features like peer-to-peer video, PWAs, and AI content tooling, led CSS framework design and OOCSS adoption, and improved Core Web Vitals through targeted performance work. An active open-source maintainer, he created notable tools such as Selectivizr and browser extensions (GA Debugger, CSS Feature Toggle) and won JS1k and Net awards for experimental demos. He regularly prototypes bleeding-edge platform features against W3C specs and publishes findings on his site, blending research-driven curiosity with pragmatic delivery. Now based in the UK, he mentors teams and bridges front-end engineering with backend APIs to deliver complete, user-focused experiences.
15 years of coding experience
23 years of employment as a software developer
ONC / HNC Electronics Communications and Avionics, ONC / HNC Electronics Communications and Avionics at Farnborough College of Technology
Stackoverflow
41reputation
215reached
0answers
1question
Github Skills (7)
css10
javascript10
testing10
html9
javascript-automation6
foundation6
cocoa6
Programming languages (6)
Github contributions (5)
keithclark/selectivizr
Jan 2011 - Nov 2012
selectivizr is a JavaScript utility that emulates CSS3 pseudo-classes and attribute selectors in Internet Explorer 6-8.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:29 commits in 1 year 10 months
Contributions summary:Keith's primary contribution focuses on developing and testing the Selectivizr JavaScript utility. They implemented a test suite for the utility, adding tests for various CSS3 pseudo-classes, attribute selectors, and URL/import syntaxes. Furthermore, they updated the testing framework to include more comprehensive tests, including those related to handling external assets and ensuring compatibility across different selector libraries and browser versions. The user also added tests for :target and :root pseudo-classes, enhanced the testing of the :empty and :hover tests, and added MooTools 1.3.1 to the test suite.
javascript-utilityselectorsinternet-explorercssjavascript
keithclark/3d-model-element
Mar 2018 - Jun 2019
A custom element for rendering inline 3D models in a HTML document and allowing them to be transformed with CSS.
Contributions:2 releases, 47 commits, 15 PRs in 1 year 2 months
3d-modelscssthreejsinlinerendering
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