(1994 - 1998)
(Realschule, 1998 - 2004)
(Berufsschule, Informationstechnischer Assistent, 2004 - 2007)
(bachelor of science [fh-dortmund], 2007 - 2011)
(master of science [fh-dortmund], 2011 - 2016)
server and software administartor in a school (2007 - 2015)
sine dec. 2011 independent commercial
- since 2011 android programming google play store
- since 2014 creating of individual software
- since 2015 software and hardware administrator for a company
(seminar paper [study]: Mobiles E-Learning - Betrachtung von Usability, bestehenden E-Learning Plattformen und mobilen Anwendungen im Hinblick auf die Entwicklung eines mobilen E-Learning Clients)
(seminar paper [study]: Effiziente Benutzertests von Android GUI-Prototypen; see above)
developed apps and libraries, later more
databases (mysql, mssql, etc.)
(master thesis: Auswertung von textuellen Benutzerkommentaren durch semantisches Data-Mining)
Developing new software from start to finish with modern techniques, databases, tools (IDE) and diagrams (UML).
Use of modern techniques, like responsive web design or software communication between to software projects over REST or SOAP services.
Repair of desktop PC's, notebooks, consoles. Administrate a network (firewall, fiberglass etc.) with windows (XP, 7, 8, 10) and mac clients.
Administration from windows and linux server and their software like Opsi, IPables, DNS, DHCP, NGINX, Squid 3, Postfix a. Dovecot (E-Mail) etc. .
User comments can help a developer to improve his app. However, the analysis is very time consuming. With an increasing number of comments, the analysis time increases as well. This work deals with how user comments can be efﬁciently and effectively evaluated. For different techniques and existing software solutions are investigated. The obtained information from the investigations is used to develop a software for the evaluation of app comments.
Usability testing is time-consuming, but it can show problems with the usability of an application at an early stage. This research project describes the integration of mobile application usability testing into software development processes by the means of prototyping. A comparison between existing solutions to capture user interactive with a mobile device is carried out. We present AndroidAdjutant which is an Android framework to automate usability testing partly, thus raising its efﬁciency. The concept is validated by a showcase usability test in the ﬁeld of m-learning.
A Gmail-like Material Drawer implementation. Based on neokree's MaterialDrawer library, but they are not the same. I have made many improvments, changes and added a lot of new features. Big thanks to neokree, without him this library would not exist.
Mobile learning is considered to be the future of e-learning as the number of mobile devices continues to rise. This paper lays the foundation of the development of a mobile e-learning application focused on usability. It presents the features of moodle and ILIAS, two existing e-learning platforms. The mobile use context is analyzed to derive usability criteria for an effective and efficient use. A comparison between web applications and native mobile applications is carried out based on their usability implications.