Steven Mohr - Senior Android Developer, Augmented Reality

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Dallgow-Döberitz, Germany

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Experience

Dec 2024 - Dec 2024

1 month

Germany

Freelance Trainer

TÜV Rheinland Akademie

Practical seminar “Generative AI in Software Development”
Mobile apps and cloud computing
Internet of Things, smart home, and consumer healthcare
The future of mobile communication

Oct 2022 - Dec 2024

2 years 3 months

Germany

Senior Android Developer

DAK-Gesundheit

Further development of the existing DAK app
Native apps with Kotlin
MVVM with databinding and Jetpack Compose
Encryption of sensitive data and generation of cryptographic keys
Accessibility according to BITV
CI/CD using Azure DevOps
Improving the app architecture through deep refactorings (e.g. navigation)
Participation in internal OWASP Top 10 training sessions
Evaluation of three providers for video consultations through a proof of concept as part of an EU-wide tender process (3x3 weeks)
Support with bootstrapping for the integration of an ePA solution into the DAK app (until a dedicated dev team was set up for this task)
Development of new features in the app: native bonus program, native management of bank details, individualized pregnancy companion
Evaluation of different SAST solutions as part of two three-week proof-of-concept phases with the providers
Technologies: Kotlin, Jetpack Compose, MVVM, Azure DevOps, accessibility according to BITV, OWASP Top 10 training

Oct 2022 - Nov 2022

2 months

Germany

Senior Android Developer (Augmented Reality)

Audi AG

Updating the AR apps (Android and iOS) for the Audi Twin Cup 2022
Coordination with the lead agency of the Audi Twin Cup
Updating the AR toolkits and the 3D models used
Android: Migration from Google Sceneform to SceneView
Coordination with the 3D agency for creating the required models
Release and ongoing support of the apps in the Google Play Store and Apple App Store

Jun 2022 - Sep 2022

4 months

Germany

Senior Android Developer

Commit GmbH

Modernization of the “VagusVit” app
MVVM with databinding as the architecture pattern
Dependency injection with Koin
Reactive programming with Kotlin Coroutines and Flow
Database integration with Room
New versions of the Android Architecture Components / Jetpack
Revised custom animations

Jan 2022 - Sep 2022

9 months

Germany

Senior Android Developer (Augmented Reality)

Otto GmbH & Co KG

Consulting in the field of augmented reality
Development of an AR feature using the SceneView library
Delivery of the feature as an internal SDK for other teams
Reimplementation of the functionality with SceneView and the current ARCore version

Sep 2021 - Dec 2021

4 months

Parental leave

May 2021 - May 2021

1 month

Germany

Senior Android Developer (Augmented Reality)

Audi AG

Updating the AR apps (Android and iOS) for the Audi Twin Cup 2021
Coordinating with the lead agency of the Audi Twin Cup
Updating the AR toolkits used and the 3D models used
Coordinating with the 3D agency to create the needed models
Publishing and further support of the apps in Google Play Store and Apple App Store

Mar 2021 - Aug 2021

6 months

Germany

Senior Android Developer

DAK-Gesundheit

Implementing a showcase Android app including later integration into the existing DAK app
Proof-of-concept apps to demonstrate future features
Native apps with Kotlin
MVVM with data binding and Android Architecture Components / Jetpack
Encryption of sensitive data and generation of cryptographic keys
Implementing OpenID Connect authentication using the AppAuth library
Accessibility according to BITV
Unit tests with JUnit, Mockito
UI tests with Espresso
CI/CD using Azure DevOps

Jan 2021 - Oct 2021

10 months

Germany

Senior Android Developer

Holtec Electronics

Developing an app to control roller shutters in the smart home area
Implementing an app for Android and iOS
Cross-platform app with Flutter
Connecting the roller shutters via Bluetooth Low Energy (BLE)
Firmware updates over BLE and DFU
Configuration, distribution, and crash reporting via Firebase

Jul 2020 - Feb 2021

8 months

Senior Android Developer

Swissprime Technologies AG

Further development and migration of the existing Android app
Native app with Kotlin
MVVM with data binding and Android Architecture Components / Jetpack
Encryption of sensitive data and generation of cryptographic keys
Connecting smart locks via Bluetooth Low Energy (BLE)
Handling push events via Firebase Cloud Messaging
Unit tests with JUnit, Mockito
Requirements documentation and CI/CD with Azure DevOps

Apr 2020 - Jun 2020

3 months

Germany

Senior Android Developer (Augmented Reality)

Audi AG

Updating the AR apps for the Audi Twin Cup 2020
Coordination with the lead agency of the Audi Twin Cup
Updating the AR toolkits used and the 3D models used
Coordination of the 3D agency in creating the needed models
Publishing and ongoing support of the apps in the Google Play Store and Apple App Store

Oct 2019 - Feb 2021

1 year 5 months

Germany

Senior Android Developer

Life Science Inkubator

Development of an Android app for capturing, analyzing, and displaying vital parameters (Monikit)
Requirements analysis
Recruiting and managing UI/UX design
Development and documentation of the Android app
Native app with Kotlin
MVVM with Data Binding and Android Architecture Components / Jetpack
Encryption of sensitive health data
Connection of a sensor via Bluetooth Low Energy (BLE) in co-development with the manufacturer
Use of a machine learning model via TensorFlow Lite
Handling push events through Firebase Cloud Messaging
Unit tests with JUnit, Mockito
UI tests with Espresso
Data processing with Jetpack Room and Coroutines

Apr 2019 - May 2019

2 months

Germany

Senior Android Developer (Augmented Reality)

Audi AG

Development and technical support of the AR apps for the Audi Twin Cup
Coordination with the lead agency of the Audi Twin Cup
Concept and creation of the AR app for Android and iOS
Android: Kotlin, ARCore, Sceneform
iOS: Swift, ARKit, SceneKit
Coordination of the 3D agency in creating the needed models
Publishing and ongoing support of the apps in the Google Play Store and Apple App Store

Mar 2019 - Oct 2019

8 months

Germany

Senior Android Developer

Daimler Fleetboard GmbH

Development of a modern Android app
Native app with Kotlin
MVVM with Data Binding and Android Architecture Components / Jetpack
Live Data, ViewModel, Navigation Component
Location-based services using Google Play Services
Text extraction from live camera images
Unit tests with JUnit, Mockito
UI tests with Espresso
Adaptation of the app for Android Auto to run on Daimler trucks
Preparation and hardening of the app for external pentesting with regard to OWASP Top 10
Development using Scrum, CI/CD with Azure DevOps

Nov 2018 - Feb 2019

4 months

Germany

Senior Android Developer

Lab 1886 GmbH

Worked on an e-scooter sharing app from the Daimler Company Builder Lab 1886
Development of a modern Android app in 8 weeks with QR code scanning, Stripe integration, and Google Maps
Native app with Kotlin
MVVM with Android Architecture Components / Jetpack
Live Data, ViewModel, Navigation Component, Data Binding
Integration of the payment provider Stripe
Google Maps SDK
Unit tests with JUnit, Mockito
UI tests with Espresso
Development according to Clean Code
CD/CI with GitLab, Gitflow branching model

Jun 2018 - Dec 2018

7 months

Germany

Senior Android Developer

Sensor Digital Media GmbH

Took over and further developed the existing Android app (phone and tablet)
Expanded and aligned the design and features with the iOS app
Step by step transformation of the Java codebase to Kotlin
Technical support and implementation of the whitelabeling approach
Use of Android Architecture Components / Jetpack

Dec 2017 - Jan 2019

1 year 2 months

Germany

Senior Android Developer (Augmented Reality)

Otto GmbH & Co KG

Development of the augmented reality app “yourhome Augmented Reality”
Native app with Kotlin, ARCore, and Sceneform
Close collaboration with the Google ARCore developer team as part of the Early Access Program
One of four showcases at the Google ARCore booth at Mobile World Congress 2018
Technologies: Kotlin, ARCore, Sceneform, SceneView

Jan 2017 - Nov 2017

11 months

Germany

Senior Android Developer

mCrumbs GmbH

Delivery of location-based apps for the cultural sector and public institutions
Use of beacons and GPS for location-aware content
Refactoring and further development of existing Android apps
Building new apps for new projects
Creation of an internal SDK to make maintenance and new app development easier
Transformation of parts of the Java codebase to Kotlin
Migration of the dependency injection framework from Dagger to Koin

Oct 2016 - Jun 2017

9 months

Android Bluetooth Classic and LE Coach

ChronicWatch

Coaching a developer in India in the following areas:
Medical device integration with Bluetooth LE and Classic
Android development
Software architecture
Coaching through BitBucket code reviews, emails, and video conferences

Sep 2016 - Dec 2017

1 year 4 months

Germany

Senior Android Developer

Otto GmbH & Co KG

Worked on projects of the Otto Mobile Labs in a Scrum context
Further development of a modular app framework (Java/Kotlin) for building shopping apps
Use of this framework in the following apps: myToys, Sheego, Heine, Lascana, SportScheck
Strong focus on software architecture and modularization
Model-View-Presenter architecture and clean code
Independent, interchangeable modules
High testability with JUnit, Mockito, Espresso
Use of backend documentation with Swagger

Aug 2016 - Sep 2016

2 months

Germany

Senior Android Developer

Commit GmbH

Porting the iOS app "VagusVit" to Android
Development of a native Android app with Kotlin
MVP as the architecture pattern
Dependency injection with Dagger
Reactive programming with RxJava and RxKotlin
Database connection with SqlBrite as ORM
Android Architecture Components
Notifications and custom animations
Infrastructure: Git with GitLab, CD/CI with Jenkins

Nov 2015 - Jul 2016

9 months

Germany

Senior Android Developer

Iconmobile GmbH / Freeletics GmbH

Development of the Freeletics Gym app up to version 1.2
Adapting iOS screen designs and implementing the UI pixel-perfectly
Implementation of in-app purchases (subscriptions)
Facebook login and registration
Video download and playback
Integration of Google Analytics
Creation of custom views (including graphs)
Use of state-of-the-art libraries (Dagger2, RxJava, Retrofit2)
Git and Gitflow
Use of backend documentation with Swagger
Agile software development process according to Scrum

Mar 2015 - Nov 2015

9 months

Germany

Senior Mobile Developer

BodyTel GmbH

Worked on a diabetes diary app for iOS, implemented in Swift
Redesign of the BodyTel Android app
Connection of two blood pressure monitors, a body scale, and a blood glucose meter based on Bluetooth LE
Development of a proof of concept for Continua-compliant transfer of medical measurement data using middleware
Introduction of Crashlytics and Beta for Android and iOS apps
Use of backend documentation with Swagger
Agile software process (Scrum) according to the requirements of a medical device manufacturer

Nov 2014 - Feb 2015

4 months

Germany

Senior Android Developer

Fortunella UG (haftungsbeschränkt)

Assignment at BodyTel GmbH
Development of mobile projects
Design of automated acceptance tests for medical software (introduction of CI with Jenkins)

Jun 2014 - Nov 2014

6 months

Germany

Senior Android Developer

Affinitas GmbH

Support in the further development of the ShopAMan app
Support in improving internal development and test processes
Requirements documentation in JIRA and Confluence
Agile software process according to Scrum

Feb 2014 - Present

12 years 8 months

Germany

Managing Director / glimpsey.io

Smart As Apps GmbH

Development services in the mobile area
Seminars and workshops in the mobile area for non-technical participants
Planning, development, and operation of the 3D/AR solution glimpsey.io
Managing an offshore developer team to implement the back-office area
Managing various other service providers
AI-supported customer acquisition
Creating case studies

Jul 2013 - May 2014

11 months

Germany

External Android Developer

BodyTel Europe GmbH

Support in further developing the Android app
Connecting new medical devices via Bluetooth
Dependency Injection with Dagger
Support in improving internal development and test processes
Agile software process (Scrum) based on the requirements of a medical device manufacturer

Apr 2013 - Jul 2013

4 months

Germany

Self-employed IT Consultant

ZappChoice GmbH

Managing the external mobile development team
Setting up an internal test process
Requirements analysis and definition with JIRA

Dec 2011 - Jan 2014

2 years 2 months

Germany

Self-employed Mobile & Web Developer

Steven Mohr Mobile & Web Development

Development of Android apps
Implementation of web projects based on Python/Django
Consulting on the concept and implementation of Android apps
Concept and setup of internal test and development processes

Apr 2011 - Jun 2012

1 year 3 months

Berlin, Germany

Technical Project Manager

German Aerospace Center (DLR)

Technical lead of the Plug&Care Connector project (connecting medical devices to smartphones as part of the EU project EmotionAAL)
Technologies: Android SDK, Android XML layouts, Bluetooth Classic, background work
Development environment: CI/CD with Hudson / Jenkins, bug tracking with Mantis
Concept and further development
Contact with customers and project partners
Support for student assistants

Apr 2011 - Jun 2011

3 months

Mannheim, Germany

System Developer

Zentrum für Seelische Gesundheit (ZI)

Design and implementation of a prototype application for ticket management based on Microsoft SharePoint 2010

Oct 2010 - Mar 2011

6 months

Mannheim, Germany

Civilian Service Volunteer

Zentrum für Seelische Gesundheit (ZI)

Sep 2007 - Sep 2010

3 years 1 month

Cologne, Germany

Dual Student

Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)

Practical phases in the department "Simulation and Software Engineering"
UI testing
Testing an Apache module using Python unit tests
Extension of and participation in the architectural refactoring of DataFinder

Industry experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Healthcare, Aerospace and Defense, Retail, Insurance, and Automotive.

Information Technology

Healthcare

Aerospace and Defense

Retail

Insurance

Automotive

Business area experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Project Management, Quality Assurance, Research and Development, and Operations.

Information Technology

Product Development

Project Management

Quality Assurance

Research and Development

Operations

Skills

Android Development (14+ Years)
Kotlin (8+ Years)
Jetpack Compose (3+ Years)
Mvvm (8+ Years)
Livedata (2 Years)
Jetpack Room (4 Years)
Coroutines (4+ Years)
Dagger2 (3 Years)
Koin (5+ Years)
Retrofit2 (8+ Years)
Firebase (5+ Years)
Git (12+ Years)
Agile Work / Scrum (12+ Years)
Unit Testing With Junit And Mockito (8+ Years)
Ui Testing With Espresso (8+ Years)
Google Maps Sdk (1 Year)
Arcore (5+ Years)
Ble (5 Years)
Stripe (1 Year)
Sceneview (1 Year)

Languages

German

Native

English

Advanced

Education

Oct 2011 - Nov 2013

Free University of Berlin

Master of Science, Software Processes and Software Engineering · Computer Science · Berlin, Germany · 1.9

Oct 2007 - Sep 2010

DHBW Mannheim

Bachelor of Engineering · Information Technology · Mannheim, Germany · 1.4

Certifications & licenses

Bringing medical apps to market safely

TÜV Rheinland

M101P: MongoDB For Developers

Statistics

Experience

Total positions 33

Experience in Information Technology 15 y

Avg length 1 y 1 m

Longest experience 12 y 7 m

Global experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Freelance Trainer, Senior Android Developer, Senior Android Developer (Augmented Reality)

Main industries Information Technology, Healthcare, Aerospace and Defense

Main business areas Information Technology, Product Development, Project Management

Qualifications

Highest degree Master

Certifications earned 3

Profile

Member since

September 2025

Last update

September 2026

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Frequently asked questions

Have questions? Find more information here.

Steven is based in Dallgow-Döberitz, Germany.

Steven speaks the following languages: German (Native), English (Advanced).

Steven has at least 19 years of experience. During this time, Steven has worked in at least 14 different roles and for 24 different companies. The average length of individual experience is 1 year and 7 months. Note that Steven may not have shared all experience and actually has more experience.

Based on recent experience, Steven would be well-suited for roles such as: Freelance Trainer, Senior Android Developer, Senior Android Developer (Augmented Reality).

Steven's most recent position is Freelance Trainer at TÜV Rheinland Akademie.

In recent years, Steven has worked for TÜV Rheinland Akademie, DAK-Gesundheit, Audi AG, Commit GmbH, and Otto GmbH & Co KG.

Steven is most experienced in industries like Information Technology, Healthcare, and Aerospace and Defense. Steven also has some experience in Retail, Insurance, and Automotive.

Steven is most experienced in business areas like Information Technology, Product Development, and Project Management. Steven also has some experience in Quality Assurance, Research and Development, and Operations.

Steven has recently worked in industries like Information Technology, Healthcare, and Insurance.

Steven has recently worked in business areas like Information Technology, Product Development, and Project Management.

Steven holds a Master in Computer Science from Free University of Berlin and a Bachelor in Information Technology from DHBW Mannheim.

Steven has 3 certificates. These include: Bringing medical apps to market safely, Certified Scrum Master, and M101P: MongoDB For Developers.

The availability of Steven needs to be confirmed.

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Daily rate avg. 1095 €

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Median rate 1000 €

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Calculated based on our freelancers’ daily rates as of 7 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.