I'm available for freelance work as senior developer, software architect and IT consultant in the Berlin-Brandenburg region, specializing in mobile applications for the Android platform, Ruby-on-Rails-based back-ends and RESTful architectures.

Beyond proven practical expertise in these areas, I offer a solid background in object orientation, from analysis and modeling to design and programming, strong communication skills, a methodological, well-structured and independent working style, and last but not least 15 years of professional experience in the IT.

In the past, I participated in or contributed to the development of the following Android apps:

Other past clients of mine are

Besides developing software I spent some time giving talks, publishing papers and organizing workshops and conferences, which are listed on my activities page.

In my spare time I sometimes make music and write weird fiction.