Klaus Hartl
Germany
Summary
🤩
Rockstar
Top expert inFront-End Web Development and Design Essentials
Klaus Hartl is a seasoned software engineer based in Germany with nearly two decades building backend systems, cloud-native infrastructure, and developer-focused tooling. He blends deep technical craftsmanship with a passion for simplicity, fast feedback, and improving developer experience. Klaus has held senior and principal roles across startups and public sector engineering teams, and co-founded a tech startup where he led product and platform work. An active open-source contributor, he has made notable front-end contributions to widely used projects like jQuery UI and js-cookie, improving robustness and test quality. Known for pragmatic distributed-systems design and hands-on devops, he favors solutions that reduce cognitive load for teams. He frames programming as an act of empathy—engineering to make other developers’ lives measurably better.
19 years of coding experience
20 years of employment as a software developer
English
Stackoverflow
11reputation
8kreached
1answer
0questions
Github Skills (11)
testing10
unit-testing10
uid10
javascript10
qunit10
front-end-development10
ui-design10
jquery10
css9
jquery-ui6
pagination6
Programming languages (16)
Github contributions (5)
carhartl/jquery-cookie
Jan 2011 - Apr 2015
No longer maintained, superseded by JS Cookie:
Role in this project:
Front-end Developer
Front-end DeveloperContributions:194 commits, 14 PRs, 8 pushes in 4 years 3 months
Contributions summary:Klaus primarily contributed to the jQuery Cookie library, focusing on enhancing its functionality and improving its test suite. They refactored the test suite, added new tests, and improved existing ones. The user also addressed issues related to handling specific edge cases, such as RFC 2068 quoted strings and cookies with URL-encoded names. Furthermore, the user made improvements to the code's overall quality by removing whitespace and adjusting header information.
js-cookiejavascriptcookie
js-cookie/js-cookie
Apr 2015 - Oct 2022
A simple, lightweight JavaScript API for handling browser cookies
Role in this project:Front-end Developer
Front-end DeveloperContributions:13 releases, 1 review, 269 commits in 7 years 7 months
Contributions summary:Klaus primarily focused on refactoring the test suite, improving its structure and readability. They introduced a node server and updated the test suite by adding tests for new features and addressing edge cases, while also removing unused code. They also updated the testing environment by incorporating the latest jQuery and QUnit versions, including handling potential encoding issues.
apibrowserjavascriptcookiehandling
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