Hello! I’m Stephan.

Senior Android Developer Platform Lead

I am a Senior Android Developer especially interested in delivering large-scale, high-quality Android projects. My past projects allowed me to drive innovation and quality in apps with hundreds of thousands of daily users. I am passionate about improving best practices for developers and work on the system architecture. Working with cross-functional teams and being involved from ideation to delivery is something I enjoy.

Availability
🔴 Not available
Starting July 2025, I’ll be available for freelance Android and Kotlin Multiplatform (KMP) projects.

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About

My professional journey for Android began in 2014, leading to a specialization in Android and Kotlin as my areas of expertise. Throughout my career, I have worked in a variety of roles, with a focus on mobile development and some ventures into web and backend development.

Additionally, I am working on the fitloxx app, a project that started as a side project and is now a fully functional and monetized gym tracking app. If you want to take a look, you can do so in the Google Play Store (→ fitloxx) or read more about the technical details in the Projects section below.

One of my current focuses is working with Kotlin Multiplatform (KMP), formerly known as Kotlin Multiplatform Mobile (KMM), which I believe has the potential to be a dominant player in mobile cross-platform development in the future.

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04.2021 - 02.2024

Android Platform Lead

Otto GmbH & Co KG | E-Commerce

Hamburg & Remote

01.2020 - 04.2021

Senior Android Developer

Otto GmbH & Co KG | E-Commerce

Hamburg

11.2018 - 01.2020

Android Developer - Kotlin / Java

moovel GmbH (later Reach NOW, mobimeo) | Mobility