Christian Katzmann
Leiter Mobile Development at qnips GmbH
Wathlingen, Lower Saxony, Germany
Summary
🤩
Rockstar🎓
Top SchoolChristian Katzmann is a seasoned mobile engineering leader with 13 years of experience, currently heading Mobile Development at qnips GmbH from Wathlingen, Germany. With a Diplom in Mathematics with a focus on Computer Science from Leibniz Universität Hannover, he blends strong analytical foundations with practical Android expertise. He is an active open-source contributor to well-known Android projects—improving libraries like StickyListHeaders, Butterknife, and the widely used gradle-play-publisher plugin—focusing on compatibility, build automation, and code quality. Christian’s work shows a pattern of pragmatic refactoring: removing unnecessary dependencies, fixing subtle API issues, and modernizing build and CI configurations to support broader device and toolchains. Known for shipping reliable releases and smoothing Play Store automation, he brings both hands-on coding chops and strategic leadership to mobile platforms.
13 years of coding experience
Diplom, Mathematik Studienrichtung Informatik, Diplom, Mathematik Studienrichtung Informatik at Leibniz Universität Hannover
Github Skills (19)
kotlin10
deploying10
groovy10
testing10
android-sdk10
java10
javas10
automation10
android10
mobile10
gradle-plugin10
automations10
gradlew10
gradle10
cicd9
Programming languages (11)
Github contributions (5)
Triple-T/gradle-play-publisher
Oct 2014 - Aug 2019
GPP is Android's unofficial release automation Gradle Plugin. It can do anything from building, uploading, and then promoting your App Bundle or APK to publishing app listings and other metadata.
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:64 commits, 52 PRs, 101 pushes in 4 years 10 months
Contributions summary:Christian primarily contributed to the `gradle-play-publisher` project, which automates Android app releases to the Google Play Store. Their work involved fixing formatting issues, updating the project's build configuration (specifically Travis CI), and refactoring the plugin's internals. They updated the AndroidPublisher library, modified APK and listing tasks, and introduced a BootstrapTask to fetch existing Play Store listings.
gradleapp-bundlemobilemetadatauploading
JakeWharton/butterknife
Jun 2013 - Jan 2017
Bind Android views and callbacks to fields and methods.
Role in this project:Android Developer
Android DeveloperContributions:12 commits, 13 PRs, 28 comments in 3 years 7 months
Contributions summary:Christian contributed to the `butterknife` repository, which is designed to bind Android views and callbacks. Their work involved addressing typos, enhancing the compilation process, and updating dependencies. The commits include modifications to various test files and sample applications, ensuring the library's functionality and compatibility. These changes demonstrate a focus on code quality, maintainability, and integration within an Android development context.
callbacksbindandroid-libraryandroidkotlin
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