The FreeBSD Project
FreeBSD is an advanced operating
system for x86 compatible and other architectures. It is derived from
4.4 BSD UNIX, the version of UNIX developed at the University of
California, Berkeley. The goals of the FreeBSD Project are to provide
software that may be used for any purpose and without strings
Writing tools for FreeBSD since 1995. FreeBSD committer since
1996. This involves write access to the master CVS tree of
FreeBSD. Performed more than 2100 commits to the FreeBSD sources and
to documentation and web server pages. FreeBSD webmaster from 1998 to
2001. Designing, implementing, and maintaining the official web site
of the FreeBSD project, including server script programming and server
security (http://www.freebsd.org). Due to the
high workload the FreeBSD webmaster is now a team of FreeBSD
developers that I am still part of.
Multicast NetNews Distribution
Develop a Multicast NetNews Distribution package at tellique GmbH.
(Usenet article distribution over an satellite link.) The software
is written in C and uses a low level multicast networking library. See
Mobile Internet Applications (UMTS)
Implement a greeting card service for cell phones users in Europe
(Vodaphone, British Telecom, Telefónica). Written in mod_perl, XHTML,
XML. See iconmobile for more
AOL Kleinanzeigen (AOL classified advertisements) for the Portals aol
client, aol.de, compuserve.de and netscape.de.
AOL Kleinanzeigen is an online application, where the users can
announce and search classified advertisements in several categories.
Users can search for other users
with similar interests (profile matching). A control tool allows the
application administration staff to manage the classified
advertisements for a high quality of the service.
The application is written in JSP and Java. The data is stored in a
XML database. The software has interfaces to
E-Mail, SMS, advertisement and billing. My contribution: developer
(programming logic, configuration, performance and quality testing)
The system performs more than 50 million requests per month (half of
spiegel.de, twice of the load of berlin.de and BerlinOnline.de
Berlin.de / BerlinOnline.de
Consulting for BerlinOnline.de, the largest
city portal of Berlin. Execution of a technical Due Diligence of berlin.de. Wrote a feasibility study
for the migration of the application from berlin.de to the platform of
BerlinOnline.de: analysis of services of berlin.de, technology, legal
obligations, PageImpressions, turnover, migration concepts.
Executing the technical migration of berlin.de to the new platform
Re-implementing several applications: yellow pages (PHP, XML, >1
million requests/month), official administration guide of the state
Berlin (PHP, MySQL), Berlin guide book (Perl).
BertelsmannSpringer Science+Business Media central search platform
Development of a central search platform for
BertelsmannSpringer Science+Business Media. Online: Lifeline,
Manager's Health, BauNetz, Transportweb and Platow Brief Online.
Fulltext and field search engine based on the Altavista SDK and MySQL.
Several millions documents (PDF, HTML). My contribution: development,
installation, maintance service (robot system and full text indexer).
Special features: PDF search, highlighting, and fuzzy search.
Other search related projects
Support other search related projects: auction search at
Lycos Greeting Cards,
fireball.de for children, fireball.de for
science, search applications of the German Government online
Distributed library system / Z39.50
Master's degree in Computer Science. Diploma thesis: ``A Distributed
Library Information System on the Basis of the Z39.50 Protocol''.
The thesis included research, many practice tests, and an
implementation of a WWW-Z39.50 Gateway for distributed search and copy
cataloging. The software is still in use by more than 80 staff users,
performing ca. 4000 (asynchronous) search requests per day. Currently
more than 20 databases available, 100 million records. See
$Date: 2007-03-17 21:23:14 $