Senior Android Developer

1/2012 – 1/2017

Freelancing as an Android developer working with Random House GmbH as well as in-house apps for Siemens and other start-ups.

Android Entwicklung, Java (allg.), Mobile Entwicklung (allg.), CSS (Cascading Style Sheet), HTML

9/2019 – 10/2020

Begleitungs des Redesigns der AOK Bonus App. Konzeption und Einführung eines Multi-Modul fähigen Single-Activity Navigationssystems unter Verwendung von MVI, RXJava und Magnet DI.

Functional reactive programming (FRP), Kotlin

11/2015 – 9/2019

Development of new features and maintenance for the leading outdoor planning navigation app in DACH - 3M downloads, up to 1M active users (depending on the season of the year).

Android Entwicklung, Java (allg.), Kotlin

4/2015 – 9/2015

Development of Semper. Semper is a vocabulary trainer app featuring various languages as well as math quizzes using an unique approach by appearing in front of the lockscreen or before apps are started. On its peak the app had several 100k users per month.

SQL, Android, Java (allg.), XML, JavaScript Object Notation (JSON), Representational State Transfer (REST)