Marek Sebera
Prague, Prague, Czechia
Summary
🤩
Rockstar
Top expert inAndroid Development and UI Design
Marek Sebera is a pragmatic security-focused software engineer with 15 years of experience based in Prague, combining a lifelong passion for security with deep hands-on Android and backend development. He has contributed to notable open-source projects—improving Android image-zoom UX in PhotoView, hardening SMS detection and UI for the IMSI-Catcher-Detector project, and maintaining core behaviors in android-async-http—demonstrating attention to reliability, compatibility and edge-case handling. Marek likes tackling thorny problems across the stack, from gesture and rotation quirks in mobile UIs to HTTP stream and authentication edge cases. Always willing to take on new challenges, he blends practical bug-fixing and refactoring with a security-first mindset that often surfaces non-obvious hardening and usability improvements.
15 years of coding experience
Stackoverflow
40,191reputation
6.7mreached
336answers
156questions
gradle
top-5%
tdd
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java
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jar
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javascript
top-5%
counter
top-5%
Github Skills (46)
http10
java10
javas10
http-client10
php10
network-protocol10
android10
code-formatting10
ipad9
jar9
debug9
android-gradle-plugin9
javascript9
exceptions9
unit-testing9
Programming languages (29)
Github contributions (5)
android-async-http/android-async-http
Oct 2013 - Jun 2020
An asynchronous, callback-based Http client for Android built on top of Apache's HttpClient libraries.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 releases, 516 commits, 37 PRs in 6 years 9 months
Contributions summary:Marek primarily contributed to the improvement and maintenance of the Android HTTP client library. Their work focused on addressing various bugs and enhancing existing functionalities such as HTTP methods, including DELETE, PUT and GET with parameters, and adding support for HTTP HEAD requests and other functionalities. The user also fixed bugs in the handling of streams and authentication, as well as introduced features to improve the handling of content encoding.
androidjava
Baseflow/PhotoView
Sep 2013 - Apr 2015
Implementation of ImageView for Android that supports zooming, by various touch gestures.
Role in this project:Mobile Developer (Android)
Mobile Developer (Android)Contributions:125 commits, 12 PRs, 10 pushes in 1 year 7 months
Contributions summary:Marek primarily contributed to code formatting and refactoring within the `photoview` Android library. These changes span multiple Java files, including those responsible for gesture detection and the core `PhotoViewAttacher` class. The contributions improved code style, and addressed some deprecation and lint warnings. Also they added examples and adjustments to ViewPager interactions and rotation functionality.
imageviewswipe-gesturestouchandroidgestures
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