Hi, my name is Stefanie aka guerillagirl

I’m working as an independent designer and strategist specialized in making digital products and websites more valueable, user friendly and more fun to use for your customers but keeping also your business goals in mind.

I like products which come with worthy and good intentions and long lasting, honest and respectful client relationships, a collaborative design process and organizations, companies

and people who are open minded when it comes to ideas for improvement.

Besides running my freelance business and our small design studio „The Geekettez“ together with my colleague Miss Moss, I study Psychology on a part time basis because of my interest in human behaviour, motivations and social psychology. My main interest lies in what is called „the human factor“ when it comes to Human Computer Interaction.

In 2007, after graduating in interactive media design from University of applied sciences Darmstadt and Cork Insitute of Technology (CIT), I started working as a web designer and part time freelancer and later as an online art director for agencies before going full time freelance in 2011 with our studio launch.

I live in Berlin, after moving here in 2014 from Mannheim because my lovely boyfriend lives here.
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Press & Publications

‚Stefanie Kegel on using social psychology in interaction design‘ Interview with Lauren Kelly from Form for thought, 04.2016.

‚More Than Just Pretty: A Guide To UX Design For Startups‘, Interview with Charmaine Li for Factory Berlin, 04.2016

‚Portfolio of the month‘, PAGE magazine Issue, 07.2014 (print & online)

‚Flatterhaft beständig‘, Interview zum Thema Freelancing, weave Magazine, Ausgabe 11.2012

‚Wireframes und Prototyping im Interfacedesign‘, webstandardsmagazin, 03.2009
PDF download


‚Intercultural Aspects in Interface Design‘ [upfront meetup Berlin, 2016]

‚Softwarebasierte Barrieren im Designprozess einreißen mit Sketch App‘ Artikel im Studio Blog [UIG Frühjahrstagung, 2016 – Geekettez Team Session]

‚Ready or not? No UI‘
Vom Verschwinden des Graphical User Interfaces. [Usability Kongress Frankfurt, 2013, Webmontag Mannheim, 2013, Geekettez Team Session]

‚User Experience, das Fundament‘
[World Usability Day, 2012 Mannheim, Geekettez Team Session plus Workshop]

‚Storytelling as a Design Tool‘ [Agile Design Camp, Hamburg 2011]

‚It’s all about communication. HCI made easy‘ Wie schaffen wir es aus puren control panels Systeme mit etwas mehr Persönlichkeit zu machen? [Webmontag Mannheim, 2011]