John Karahalis
City of Rochester, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolJohn Karahalis is a detail-oriented software engineer with 14 years of experience building reliable, user-focused web applications and data products. He has led front-end and ETL work for Mozilla, including the Firefox Public Data Report, and contributed UI improvements to MDN’s kuma project, touching templates, CSS, and responsive behavior for a major developer resource. At Inveniem he drove full-stack enhancements—shipping a React bulk-edit feature, upgrading ETL for version migrations, and strengthening automated test coverage—demonstrating both technical leadership and a commitment to quality. Equally comfortable coding, testing, or managing projects, he blends strong written communication with a pragmatic, generalist skill set. Based in Rochester, NY, he brings a knack for improving usability and reliability in mature platforms and a history of turning maintenance-heavy systems into more sustainable products.
14 years of coding experience
19 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Rochester Institute of Technology
English, American Sign Language
Stackoverflow
3,399reputation
72kreached
9answers
13questions
firefox
top-1%
font-size
top-1%
Github Skills (16)
html10
css10
font-size10
firefox10
front-end-development10
responsive-design9
ui-design8
vim6
drupal6
timezone6
javascript6
spellchecking6
eslint6
language-server-protocol6
jquery6
Programming languages (25)
Github contributions (5)
mdn/kuma
Mar 2012 - Mar 2016
The project that powers MDN.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:729 commits, 210 PRs, 128 pushes in 4 years
Contributions summary:John's contributions primarily focused on updating the MDN website's templates and CSS. They removed unnecessary HTML spans, added and styled various UI elements like buttons, and addressed display issues by implementing media queries. They also updated the links in the footer and other content to reflect the correct resource URLs. Their work involved direct interaction with the website's presentation and user interface.
reactpythonsasscssjavascript
openjck/svelte-parcel-template
Oct 2019 - Sep 2021
A minimal template for using Svelte which uses Parcel as a bundler
Contributions:2 reviews, 7 PRs, 17 pushes in 1 year 11 months
templatebundlerminimal-templatesveltesveltejs
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