Andrea Giammarchi
Milan, Lombardy, Italy
Summary
🤩
Rockstar🎓
Top SchoolAndrea Giammarchi is a JavaScript and web-standards expert with 17+ years of production experience and over five years focused on high-performance JS engineering for ad-blocking at scale. He’s the creator and maintainer of numerous open-source libraries with hundreds of millions of npm downloads, has contributed to high-profile projects like the js-framework-benchmark and Twemoji, and helped advance browser capabilities (including work on :has() via Igalia). Comfortable across the full stack—Node.js, PHP, C, Python, SQL and daily Linux/Bash—he emphasizes extreme performance, low memory footprint, and 100% test coverage in many projects. A pragmatic problem solver and occasional architecture blogger, Andrea balances deep language knowledge (JS/TypeScript via JSDoc) with standards work at TC39, WHATWG and Node.js. Though not chasing every trendy framework, he’s a fast learner with a track record of shipping code that runs on millions of devices.
17 years of coding experience
9 years of employment as a software developer
PHP and OOP in PHP, PHP and OOP in PHP at Zend Certified EngineerCS50x, Computer Science, CS50x, Computer Science at CS50HTML5, Computer Science, HTML5, Computer Science at edXJava 2 basis + advanced, Java 2 basis + advanced at Sun MicrosystemFlash MX to MX2004 - ActionScript 1.0 / ActionScript 2.0, Flash MX to MX2004 - ActionScript 1.0 / ActionScript 2.0 at Macromedia - Certified ActionScript 2.0 DeveloperCS50: CS50's Introduction to Computer Science, Computer Science, CS50: CS50's Introduction to Computer Science, Computer Science at HarvardXBachelor of Science (B.Sc.), Computer and Information Systems, Credentials Equivalency, Bachelor of Science (B.Sc.), Computer and Information Systems, Credentials Equivalency at Baruch College, City University of New York (CUNY)
Italian, English
Stackoverflow
57reputation
0reached
1answer
0questions
Github Skills (25)
benchmark10
javascript10
python10
testing10
dom-manipulation10
front-end-development10
html10
custom-element10
pyodide10
codemirror10
emoji9
compatible9
browser-support9
ui-design9
uid9
Programming languages (22)
Github contributions (5)
WebReflection/document-register-element
Jul 2014 - Oct 2020
A stand-alone working lightweight version of the W3C Custom Elements specification
Role in this project:
Front-end Developer
Front-end DeveloperContributions:240 commits, 36 PRs, 222 pushes in 6 years 3 months
Contributions summary:Andrea's commit focuses on improving the state management in the `document-register-element` library. This includes adding support for the `DOMContentLoaded` event for older Android versions and addressing a PhantomJS test by adding a fix for nested elements with regards to innerHTML helper and its use. The user implemented a series of updates and fixes, targeting IE8 and Chrome.
w3cpolyfillv1v0
WebReflection/linkedom
Dec 2020 - Nov 2022
A triple-linked lists based DOM implementation.
Role in this project:Front-end Developer
Front-end DeveloperContributions:127 reviews, 463 commits, 95 PRs in 1 year 11 months
Contributions summary:Andrea contributed to a triple-linked list based DOM implementation, focusing on various aspects of the DOM. Their work included implementing and testing the `normalize()` method and refining the implementation to avoid classList creation in `getElementsByClassName`. Furthermore, the user updated the code with the 0.1.4 and 0.1.5 versions to include added and improved elements. The user's contributions demonstrate a commitment to DOM implementation and optimization.
domlinked-listssr
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