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Lennart Hennigs is a Senior Interaction Designer at Deutsche Telekom, where he designs for mobile and fixed-line user experiences. He has worked in the field for over ten years — beginning with classic usability engineering; he shifted his focus to conception and interaction design in 2003.
Lennart studied Computer Science and Philosophy. He is active in the German Chapter of the UPA and when he is not busy commuting he writes about UX topics. He recently wrote an ebook about mobile prototyping with Axure RP.
Mobile user experience design is maturing. One way to gauge this is to look at the tools at our disposal. Prototyping tools such as Balsamiq, Axure and Fireworks enable us to build wireframes and click-dummies, helping us to explain the targeted user experience.