Ronald Brill
Prinzipal at GEBIT Solutions GmbH
Cologne Bonn Region Germany
Summary
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RockstarRonald Brill is a principal software architect and engineer with over 15 years of professional experience, currently leading technical efforts at GEBIT Solutions in the Cologne–Bonn region. He is a long-time maintainer and committer of the HtmlUnit open-source project, where his backend work has advanced CSS handling, CSS3 pseudo-classes, and test infrastructure. Ronald brings deep QA and test-automation expertise from contributions to Selenium and Google OSS-Fuzz, improving HtmlUnit drivers, fuzzers, and build/test reliability in widely used projects. His background includes low-level JavaScript engine improvements in Mozilla Rhino, reflecting a strong focus on performance, language features (ES6), and robust library design. Colleagues rely on him for pragmatic architecture, meticulous testing, and the kind of incremental refactors that quietly make large codebases more maintainable.
15 years of coding experience
14 years of employment as a software developer
Github Skills (23)
javascript10
webdriver10
selenium10
testing10
css10
selenium-ide10
java10
regular-expression10
javas10
javascript-engine10
dom10
fuzzing10
fuzzer10
fuzz-testing10
test-automation10
Programming languages (11)
Github contributions (5)
mozilla/rhino
Aug 2017 - Dec 2022
Rhino is an open-source implementation of JavaScript written entirely in Java
Role in this project:
Back-end Developer
Back-end DeveloperContributions:152 reviews, 239 commits, 304 PRs in 5 years 4 months
Contributions summary:Ronald primarily focused on cleaning up and simplifying the Java implementation of the JavaScript engine, Rhino. Their contributions included improving string concatenation performance, fixing issues related to JavaScript functions and regular expressions. The user also implemented and improved support for ECMAScript 6 features like rest parameters and contributed to the TypedArray implementations within the Rhino JavaScript engine.
jsinteropjavascriptjavarhinogwt
HtmlUnit/HtmlUnit
Aug 2018 - Aug 2018
Role in this project:Back-end Developer
Back-end DeveloperContributions:5 branches in 1 day
Contributions summary:Ronald's commits focus on the implementation of features related to CSS style handling within the HtmlUnit library. They introduce the concept of a CssStyleSheet as a backend for CSSStyleSheet, and modify existing code to use the new backend implementation. The user also added support for features such as CSS3 pseudo-classes and updated various CSS related test cases.
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