Karl T
Software Engineer at FormDev Software GmbH
Munich, Bavaria, Germany
Summary
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RockstarKarl T is a Munich-based software engineer with 11 years of experience specializing in desktop UI and developer tooling. He is the creator of JFormDesigner and FlatLaf and has a track record of improving usability and theming across major projects, including integrating FlatLaf into Apache NetBeans. His open-source work focuses on polished, accessible UI experiences—implementing dark themes, HiDPI support, improved auto-completion, and visual previews—and extends to JavaFX rich-text editor fixes and cross-version compatibility. Known for attention to detail in visual polish and developer UX, he combines hands-on front-end craftsmanship with a practical sense for maintainable tooling that benefits IDEs and GUI builders alike.
11 years of coding experience
Github Skills (18)
develop10
javaswing10
javafx10
user-interface10
netbeans-platform10
ui-design10
java10
javas10
netbeans10
rich-text-editor10
swing10
custom-theme9
customizer9
css9
ide9
Programming languages (8)
Github contributions (5)
JFormDesigner/FlatLaf
Aug 2019 - Jan 2023
FlatLaf - Swing Look and Feel (with Darcula/IntelliJ themes support)
Role in this project:
UI Developer
UI DeveloperContributions:57 releases, 10 reviews, 2236 commits in 3 years 5 months
Contributions summary:Karl primarily focused on improving the FlatLaf Swing Look and Feel theme editor, specifically enhancing the user interface. They implemented features to always select all text in find/replace fields, improved auto-completion for theme properties, added support for dark themes and font size adjustments, and added a visual preview area to showcase the effects of theme changes. The contributions indicate a focus on UI development and usability improvements.
flatlafintellijswinglook-and-feeljava-swing
apache/netbeans
Dec 2019 - Jan 2023
Apache NetBeans
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:37 reviews, 73 commits, 75 PRs in 3 years 2 months
Contributions summary:Karl primarily contributed to enhancing the UI/UX of the NetBeans IDE by implementing FlatLaf, a third-party look and feel library. Their work included fixing visual glitches, adjusting tab displays, adding custom styling for various components like buttons, and updating the application's color scheme. They also addressed issues related to HiDPI screens and integrated new icons. The user demonstrated expertise in integrating and customizing a third-party UI library within the NetBeans platform.
netbeansnetbeans-platformidecode-editorjava
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