Philipp Nowak is an Android developer with 9 years of experience building high-traffic consumer apps and mission-critical mobile products across media and public transport. He has driven key features like recipe detail pages and a short-video feed at Chefkoch/RTL and maintained the DB Navigator app while owning CI/CD and mentorship responsibilities. Philipp contributes to notable open-source projects including the Corona-Warn-App, where he improved localization, sorting, and modernized the codebase by migrating to Jetpack view binding. Comfortable with Kotlin, Jetpack Compose, MVVM and coroutines, he blends product-focused frontend craftsmanship with pragmatic backend integrations. Based in the Cologne–Bonn region, he now applies his expertise at Quartett mobile and often surfaces small UX improvements (e.g., case-insensitive sorting and configurable MJPEG view appearance) that noticeably improve user experience.
8 years of coding experience
10 years of employment as a software developer
Bachelor of Engineering Computer Science (Praktische Informatik), Bachelor of Engineering Computer Science (Praktische Informatik) at University of Cooperative Education
IT-Specialist Application Development, IT-Specialist Application Development at Chamber of Commerce Ostthüringen
Native Android app using the Apple/Google exposure notification API. The CWA development ends on May 31, 2023. You still can warn other users until April 30, 2023. More information:
Role in this project:
Mobile Developer (Android)
Contributions:27 reviews, 12 commits, 13 PRs in 9 months
Contributions summary:Philipp primarily contributed to the Android application, focusing on bug fixes and feature enhancements within the Corona-Warn-App. Their work included fixing alphabetical order in country lists, implementing case-insensitive sorting for contact diary entries, and localizing date formats. They also removed the Kotlin Android Extensions plugin and replaced it with Jetpack view binding, improving the codebase.
Contributions:8 commits, 4 PRs, 12 comments in 3 days
Contributions summary:Philipp primarily focused on enhancing the visual aspects and customization options within the Android application. They implemented features to modify the background color of the MJPEG view and FPS overlay, as well as the text color of the FPS overlay. Further improvements included the ability to set the background to transparent and clear the stream, along with adding a new activity to demo custom appearance.
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Philipp Nowak - Android Developer at Quartett mobile