Mathias V.-Senior Android Developer / Freelancer
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Experience
Fullstack AI Engineer
Ammodia.com
Developed a custom Kotlin Multiplatform app with a Spring backend and AI features.
Senior Android Developer / Freelancer
Adevinta
- Continued development of the Kleinanzeigen app
- Android
- Kotlin
- Coroutines
- Jetpack Compose
Senior Android Developer / Freelancer
Arvato
- Warehouse management Android app for Zebra devices with SAP integration
- Android
- Kotlin
- Retrofit
Senior Android Developer / Freelancer
Ebay Kleinanzeigen
- App development, focusing on rebranding and introducing a design system
- Android
- Kotlin
- Jetpack
Senior Android Developer / Freelancer
Mobimeo GmbH
- App development for DB Regio (Streckenagent)
- Android
- Kotlin
Senior Android Developer / Freelancer
IBM Deutschland GmbH
- Software development for the IBM healthcare platform (eGA, ePA)
- Android
- Kotlin
- Coroutines
- RXJava
Senior Android Developer / Freelancer
Durstexpress GmbH
- Development of the driver app as a native Android app
- Android
- Kotlin
- RXJava
- Retrofit
Android Developer / Freelancer
Steeeg GmbH
- Development of the Wienerberger planning tool as a native app for iOS and Android
- Xcode
- Swift
- Android
- Kotlin
Senior Android Developer / Temporary Agency Work
Daimler TSS GmbH
- Development of a new Android app and further development of apps
- Android
- Kotlin
- Databinding
Android Developer / Freelancer
Steeeg GmbH
- Visitor guide for the Bautzen Memorial as a native Android app
- Update of the visitor guide for the Jewish Museum Rendsburg
- Update of the Aramark app (iOS, Android)
- Android
- Kotlin
- Indoor navigation
- Java
- Objective C
Senior Android Developer / Freelancer
Freenet AG
- New development of the Klarmobil Android app
- Android
- Kotlin
- GraphQL
- Databinding
Android Developer / Temporary Contractor
Daimler TSS GmbH
- Further development of the Mercedes Me app in a cross-functional team
- Android
- Java
- Kotlin
- Dagger
- Retrofit
- Robolectric
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Transportation, Automotive, Retail, Food and Beverage, and Healthcare.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, and Supply Chain Management.
Summary
Experienced software developer with more than 12 years of expertise in designing and developing mobile apps. Specialized in Android, with a preference for Kotlin and high-quality code. I enjoy sharing my knowledge with agile, cross-functional teams and designing modern applications.
Skills
- Programming Languages: Kotlin, Java, Php, Swift, Objective C, C++
- Mobile Apps: Android, Jetpack, Retrofit, Coroutines, Rxjava, Koin, Dagger, Gradle
- Testing: Junit, Mockito, Espresso, Robolectric
- Interfaces / Web: Rest / Json, Html5, Css, Javascript, Graphql
- Databases: Mysql, Sqlite / Room, Mongodb
- Development Process: Git, Scrum, Jira, Confluence, Figma, Ci/Cd
Languages
Education
Beuth Hochschule für Technik
Master of Science · Media Computing · Berlin, Germany
Beuth Hochschule für Technik
Bachelor of Science · Media Computing · Berlin, Germany
DAA Technikum
State-Certified Computer Scientist, specializing in Technical Computer Science · Computer Science · Würzburg, Germany
Certifications & licenses
Foundations Of Objective-C App Development
University of California / Coursera
Programming Cloud Services For Android Handheld Systems
Vanderbilt University / Coursera
Programming Mobile Applications For Android Handheld Systems
University Of Maryland / Coursera
Machine Learning
Stanford University / Coursera
Statistics
Experience
Global experience
Expertise
Qualifications
Frequently asked questions
Have questions? Find more information here.
Mathias is based in Berlin, Germany and can operate in on-site, hybrid, and remote work models.
Mathias speaks the following languages: German (Native), English (Advanced).
Mathias has at least 9 years of experience. During this time, Mathias has worked in at least 5 different roles and for 10 different companies. The average length of individual experience is 1 year and 9 months. Note that Mathias may not have shared all experience and actually has more experience.
Based on recent experience, Mathias would be well-suited for roles such as: Fullstack AI Engineer, Senior Android Developer / Freelancer, Android Developer / Freelancer.
Mathias's most recent position is Fullstack AI Engineer at Ammodia.com.
In recent years, Mathias has worked for Ammodia.com, Adevinta, Arvato, Ebay Kleinanzeigen, and Mobimeo GmbH.
Mathias is most experienced in industries like Information Technology, Transportation, and Automotive. Mathias also has some experience in Retail, Food and Beverage, and Tourism.
Mathias is most experienced in business areas like Information Technology, Product Development, and Supply Chain Management.
Mathias has recently worked in industries like Information Technology, Transportation, and Retail.
Mathias has recently worked in business areas like Information Technology, Product Development, and Supply Chain Management.
Mathias holds a Master in Media Computing from Beuth Hochschule für Technik, a Bachelor in Media Computing from Beuth Hochschule für Technik and a Bachelor in Drafting from Staatl. Berufsschule I Kempten (Allgäu) / Ing. Büro Schneider & Theisen.
Mathias has 4 certificates. Among them, these include: Foundations Of Objective-C App Development, Programming Cloud Services For Android Handheld Systems, and Programming Mobile Applications For Android Handheld Systems.
Mathias is immediately available full-time for suitable projects.
Daily rate distribution
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 3 Nov 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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