Project Challenges

Projects 2020-2021

Project
CHECK24 Vergleiche
Client
CHECK24 Profis
Description
Comparison Portal
My Role
Technical Team Leader Android
My Challenges
Technical Leading 11 Android developers
Technologies
native android development, transformation portal flex
Languages
Kotlin
Platform
Android / Huawei / iOS / Web
Store

Project
CHECK24 Profis
Client
CHECK24 Profis
Description
For service providers like moving companies, craftsman.
My Role
Technical Team Leader Android
My Challenges
Technical Leading 8 Android developers
Technologies
native android development
Languages
Kotlin
Platform
Android / Huawei / iOS / Web
Store

Projects 2019-2020

Project
Europa-Park & Rulantica
Client
Europa-Park GmbH & Co Mack KG
Description
Amusement park companion app with focus on offline first.
My Role
Lead Android Developer
My Challenges
Google maps integration (custom tiles, 450+ custom pins, custom in park routing with dijkstra, multiple custom clusters, custom camera movements and much more), reliable and bandwidth efficient scheduled database updates, alarm and custom local push notifications, in-app radio service, media gallery, in-app 360 degree youtube video stream, runtime language changing, analytics, atomic design.
Technologies
Extensive Google-Maps Features, Coroutines, Realm
Languages
Kotlin
Platform
Android / iOS / Web
Store

Project
Ivie - Vienna Guide
Client
Vienna.info
Description
Digital City Guide for everything about Vienna’s sights, from the Schönbrunn palace through the Prater to St. Stephen's Cathedral and the Ringstrasse boulevard.
My Role
Android Developer & Consultant
My Challenges
Consulting android, kotlin, google maps, networking, architecture, build pipeline; code reviews.
Technologies
Google-Maps, Coroutines, Retrofit, in-app navigation.
Languages
Kotlin
Platform
Android / iOS
Store

Project
MagentaSport
Client
Telekom Deutschland GmbH
Description
Sport video app: football, ice hockey, basketball or other sports - watch all games online in HD quality.
My Role
Android Developer & Consultant
My Challenges
Rework network layer using retrofit, Rx with client authentication error recovery over multiple different endpoints also consulting android developer team.
Technologies
video streams, DRM, REST, Exoplayer
Languages
Java, Kotlin
Platform
Android TV
Store

Projects 2018-2019

Project
freenet TV
Client
mobile.de GmbH
Description
Application for freenet.tv users to manage their account: prolong their subscriptions, add/activate new devices and interact with customer service.
My Role
Lead Android Developer
My Challenges
Started with a port from Xamarin to native Android/Swift and iOS/Swift and replacing more and more webviews with native views using service driven ui configurations.
Technologies
Service Driven UI
Languages
Kotlin, C#
Platform
Android / iOS / Web
Store

Project
mobile.de Auto-Panorama
Client
mobile.de GmbH
Description
For car seller: Creating 360 degree interior and exterior views of a car using external 360 degree wifi camera for internal view and mobile phone camera combined with sensors a 360 external view of a car.
My Role
Android Developer, Web Developer & Consultant
My Challenges
user guided ui and using acceleration/gyroscope sensors with camera to create 360 external view of a car, sdk for mobile.de app for a 360 degree player interior, image player exterior, gestures, blur letterbox, real-time Defishing fish eye distorted images, memory management, on-device video post-processing with media-codec and ffmpeg.
Technologies
OpenGLES, Motion Sensors
Languages
Java, Kotlin, OpenGLES, GLSL
Platform
Android / iOS / Web
Store

Project
A&O Hostels
Client
A&O Hostels
Description
Booking & door opening app
My Role
Lead Android Developer
My Challenges
Hafele SDK to open doors via bluetooth, REST calls to 2 different backends, Payment integration for BitPay (Bitcoins), PayPal, Sofort, Concardis, Amazon
Technologies
Xamarin, Hafele SDK, Bluetooth LE
Languages
mainly C#, for dependencies Java, Kotlin
Platform
Android / iOS
Store

Project
Satellite Camps
Client
Initiative KZ-Außenlager Lichterfelde e.V.
Description
Educational app about satellite camps during 2nd world war with locations and interviews from eye witnesses.
My Role
Android Developer & Consultant
My Challenges
Project setup, video player, localization, build pipeline.
Technologies
ExoPlayer, REST
Languages
Kotlin
Platform
Android / iOS
Store

Project
Balsam
Client
Charité Universitätsmedizin zu Berlin
Description
The Balsam App was developed by a group of psychologists, psychiatrists and researchers to help migrants and refugees understand the underlying mechanisms of their stress and arm themselves with the appropriate tools to cope with and rise above the troubles that life can bring from time to time.
My Role
Lead Android Developer
My Challenges
Offline Functionality with 130+ Videos, 4 Languages, Right-to-left layouts and gestures, Scheduled Assessments, no backend api, custom ssl certificate, Google Fitness, also video transcoding: optimizing file size, changing audio, subtitle tracks for 170 videos times 4 languages.
Technologies
Camera Sensor as Heart Rate Meter, Realm, Rx, ExoPlayer, Local Push, Alarm, NDK, FFmpeg
Languages
Java, Kotlin, C++
Platform
Android / iOS
Store

Project
CityCube Berlin VR
Client
Messe Berlin
Description
VR Demo to visualize exhibition's stand locations of exhibitor.
My Role
Unity VR Developer
My Challenges
360 Degree image and positioning interactivce marker of exhibitors in 3d space.
Technologies
Unity3d, Samsung VR Gear
Languages
C#
Platform
Android Samsung VR Gear
Store
B2B internal app

Project
X-Stripes
Client
X-Stretch UG
Description
Fitness trainer app. Measuring body movement and connecting them to your mobile phone in order to give meaningful training advice. Especially build custom bendable bluetooth devices were used.
My Role
Lead Android Developer & Bluetooth consultant to device manifacturer.
My Challenges
Connecting multiple custom crafted bluetooth le devices simultanously to an android phone, waking the devices, recovering connection problems and smoothing sensory input values, displaying user movement in ui.
Technologies
Bluetooth LE
Languages
Kotlin
Platform
Android
Store
canceled protype

Project
Gothaer Schadentracker
Client
Gothaer Versicherungsbank
Description
Uploading accident photos and claims information easy and convenient.
My Role
Android Developer
My Challenges
Taking photos, staying sync with backend, SMS registration, semi-complex taking photo and upload wizard
Technologies
Realm, Rx
Languages
Java, Kotlin
Platform
Android / iOS
Store

Projects 2017

Project
City Guide App
Client
Tamedia AG
Description
City Guide App.
My Role
Android Consultant
My Challenges
Consulting viable and feasable technologies.
Technologies
Maps, Server communication, Notifications, payment.
Languages
Kotlin
Platform
Android
Store
canceled project

Project
Home Mat Home Control
Client
Colorfy p.p Henkel AG & Co. KGaA
Description
Provides personal customized scheduled mosquito bio liquid dispenser group controls.
My Role
Lead Android Developer
My Challenges
korean market, korean language, controlling a custom in-house produced dispenser hardware using Pubnub, lots of custom views, e.g. a shakable refillable bottle view, list animations, viewpager animations, custom multi state button reflecting dispenser state, custom bit-vise memory ssl encryption, programmatically connecting to dispenser using dispenser wifi, lots of error handling popups for user feedback, timezone handling
Technologies
PubNub, Realm, serverless,, Rx, Accuweather, Alarm, Push Notifications, NDK, Youtube SDK
Languages
Java, Kotlin, OpenGLES, C++
Platform
Android / iOS
Store
(Note: requires home mat dispenser)

Project
Operation Helix - Messenger Game
Client
Verlagsgruppe Random House GmbH
Description
Interactive text adventure by best-selling author Marc Elsberg
My Role
Android Developer
My Challenges
Designing pipeline for combining storytelling tool for content creation and app development.
Technologies
Alarm, Push Notification, custom chat
Languages
Java / Kotlin
Platform
Android / iOS
Store

Project
Brandfirst Patient Information
Client
Brandfirst
Description
iPad Pro optimized and utilizing the iPen to draw on organs in order to explain upcoming surgery procedures to patients.
My Role
Unity Developer
My Challenges
Painting on 3D Model, picking color, drawing lines in 3D space, user interface, adding form for signitatures, smoothening handwritten signitature, record voice to screen capturing while interacting with application.
Technologies
Unity3D, iPad pen, live texture painting
Languages
C#
Platform
iPad
Store
B2B internal protype

Project
Glyph CES VR Headset showcase
Client
Avegant
Description
Exhibition VR Headset Showcase.
My Role
Android Developer
My Challenges
Smoothening sensory input values using kalman filter. Connecting VR headset to FireTV and playing 360 video playlist, transcoding video bitrate using ffmpeg to maximize video quality.
Technologies
FireTV, FFmpeg, Kalman Filter, Bonjour Service
Languages
C#
Platform
Android FireTV
Store
B2B internal app.

Project
Computop Payment SDK
Client
Computop
Description
Android Payment SDK
My Role
Android Developer
My Challenges
SDK design, payment integration wechat, paypal, credit card, debit, alipay
Technologies
Android Library
Languages
Java
Platform
Android / iOS / Web
Store
Computop-Android-SDK
Android Sample App

Project
rbb24
Client
Rundfunk Berlin-Brandenburg
Description
News App
My Role
Android Developer
My Challenges
Plugin text to speech integration
Technologies
Cordova
Languages
Java, Javascript, iOS
Platform
Android / iOS
Store

Project
The Berlin Wall
Client
Bundeszentrale für politische Bildung
Description
Travel guide and history app for berlin’s wall.
My Role
Android Developer
My Challenges
Maintenance, updated all used sdks and target api levels in 2017 from 2012’s app launch
Technologies
Open Street Map, video, audio
Languages
Java
Platform
Android / iOS
Store

Project
TELEKOM SPORT
Client
Deutsche Telekom AG
Description
Sport news app, video playback for basketball and ice hockey
My Role
Android Developer
My Challenges
Fire TV Controller integration, custom navigation for item selection of controller
Technologies
video streams
Languages
Java
Platform
Android Amazon FireTV
Store
https://www.amazon.de/Deutsche-Telekom-AG-TELEKOM-SPORT/dp/B0743F1H4F/

Projects 2014-2016

Project
Bluewin TV App
Client
Swisscom
Description
News app
My Role
Lead Android Developer
My Challenges
TV layouts, custom android API integration for app installation and starting videos on TV
Technologies
Swisscom box
Languages
Java
Platform
Custom Android Rom
Store
Custom store & automatically installed on device

Project
AstroTV
Client
adviqo GmbH
Description
Spiritual life counseling but with videos instead of only calling people
My Role
Android Developer
My Challenges
Maintenance, updating sdks and target api
Technologies
Video, REST, Push Notifications, SQL Lite
Languages
Java
Platform
Android / iOS
Store

Project
Questico (Germany)
Client
adviqo GmbH
Description
Spiritual life counseling
My Role
Lead Android Developer
My Challenges
White label, 12 different languages, layouts and rest integration, extensive analytics
Technologies
SMS, phone calls, Push Notifications, Alarm
Languages
Java
Platform
Android / iOS
Store

Project
The Circle (the UK, USA, Canada)
Client
adviqo GmbH
Description
Spiritual life counseling
My Role
Lead Android Developer
My Challenges
White label, 12 different languages, layouts and rest integration, extensive analytics
Technologies
SMS, phone calls, Push Notifications, Alarm
Languages
Java
Platform
Android / iOS
Store

Project
Tirol Travel Guide
Client
Tirol Werbung GmbH
Description
Travel guide app for tirol
My Role
Android Developer
My Challenges
Maintenance, updating sdks, fixing bugs, downloading assets after app start
Technologies
Open Street Map
Languages
Java
Platform
Android / iOS
Store

Project
Jaguar Route Planner
Client
Here
Description
Companion app for Jaguar cars. Particular focus on synchronizing routing, points of interests between car and phone.
My Role
Windows Phone Developer
My Challenges
Porting android app to windows phone. Mapping Here API to C# for windows phone.
Technologies
Windows Phone, REST, MVVM.
Languages
C#
Platform
Windows Phone
Store
canceled project

Project
Toggolino Club Spiele
Client
RTL DISNEY Fernsehen GmbH & Co. KG
Description
Mini games for Super RTL
My Role
Android Developer
My Challenges
Mini game implementation
Technologies
Unity3D
Languages
C#
Platform
Android / iOS / Web
Store

Project
Dina Foxx
Client
UFA
Description
Companion App for 3 part ZDF TV movie
My Role
Android Developer
My Challenges
TV layouts, custom android API integration for app installation and starting videos on TV
Technologies
Native android, Unity3D, 360 degree videos with marker
Languages
Java, C#, GLSL
Platform
Custom Android Rom
Store
(no longer in store, however: https://www.appbrain.com/app/dina-foxx/de.zdf.dinafoxx)

Project
Agent Alice
Client
Wooga
Description
Hidden Object Game
My Role
Android Developer
My Challenges
Android asset pipeline to create video and image assets for 12 different languages and for 4 cpu architectures and 5 different pixel perfect resolutions.
Technologies
Unity3D
Languages
C#
Platform
Android / iOS
Store

Project
Jelly Splash
Client
Wooga
Description
Match 3 game
My Role
Android Developer
My Challenges
Porting Objective-C to C++ / Java
Technologies
NDK, Cocos2D
Languages
C++, OpenGLES, Java, GLSL
Platform
Android / iOS
Store

Project
Diamond Dash
Client
Wooga
Description
Match 3 game
My Role
Android Developer
My Challenges
Porting Objective-C to C++ / Java
Technologies
NDK, Cocos2D
Languages
C++, OpenGLES, Java, GLSL
Platform
Android / iOS
Store

Project
Pocket Village
Client
Wooga
Description
City Builder Game.
My Role
Android Developer
My Challenges
Porting Objective-C to C++ / Java
Technologies
NDK, Cocos2D
Languages
C++, OpenGLES, Java, GLSL
Platform
Android / iOS
Store

Project Challenges

Projects 2020-2021

CHECK24 Vergleiche

CHECK24 Profis

Projects 2019-2020

Europa-Park & Rulantica

Ivie - Vienna Guide

MagentaSport

Projects 2018-2019

freenet TV

mobile.de Auto-Panorama

A&O Hostels

Satellite Camps

Balsam

CityCube Berlin VR

X-Stripes

Gothaer Schadentracker

Projects 2017

City Guide App

Home Mat Home Control

Operation Helix - Messenger Game

Brandfirst Patient Information

Glyph CES VR Headset showcase

Computop Payment SDK

rbb24

The Berlin Wall

TELEKOM SPORT

Projects 2014-2016

Bluewin TV App

AstroTV

Questico (Germany)

The Circle (the UK, USA, Canada)

Tirol Travel Guide

Jaguar Route Planner

Toggolino Club Spiele

Dina Foxx

Agent Alice

Jelly Splash

Diamond Dash

Pocket Village

project