Senior Software Developer (Android, Kotlin, Ktor, gen. AI / KI / GPT)

5/2023 – offen

I design and develop both Android and backend application for AI content generation app “Mind Extension” -Hyperlink entfernt- using latest Android technologies (Kotlin, Coroutines, Compose, Dagger Hilt DI, MVI, Mockk) and Google Cloud Platform + GitLab CI infrastructure for my backend (Cloud Run, Docker, Ktor, Koin DI, Detekt, Mockk)

As part of this project, I integrated services such as Google InApp Billing, Cloudinary CDN, OpenAI GPT, StabilityAi Stable Diffusion and Firebase SSO and Storage.

Android, Backend, Google Cloud, Kotlin, Mobile Application Development

2/2022 – 7/2023

With a team of over 250 people (>40 Android devs on one codebase) I'm working on their next generation media streaming solution for RTL. My team is responsible for creating the podcast section of the app. Highlights: Working with a very large team utilising the SAFe framework in a highly modularised project.

Tools and Skills: Kotlin, Dagger/Hilt Dependency Injection, Coroutines, MVVM, Retrofit/okhttp, GitLab, AndroidX, Mockito, Scrum & SAFe, Confluence, Jira, MS Teams, Jetpack Compose

Android, Git, Graphql, Jira, Kotlin, Scrum

2/2021 – 1/2022

Together with the existing Android team I have further developed the Immowelt Search App. Highlight: Designing a polygon draw and erase feature prototype for creating search areas on Google Maps based on the JTS Topology Suite and the Android motion event system.

Android, Design Thinking, Gradle, Jenkins, Jira, Kotlin, Scrum

9/2019 – 12/2020

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.

Reactive Programming, 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, Json, Representational State Transfer (REST)

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 Application Development, CSS (Cascading Style Sheet), HTML