Freelance software developer              
Freelance software development           
C++, Java (J2EE,J2SE,JSP,Servlets), Perl and PHP
Linux, MacOS, MacOSX, Windows, iOS, Android       

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Perl-Projects

Most of the following projects where implemented on a contract basis.


ASP Java (J2EE/J2ME/J2SE) Perl PHP Administration



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CurriculumVitae / Skills
Stefan Sonntag
Computer Scientist
(Freelance software developer)
Weserstr. 35
10247 Berlin
Germany
E-Mail stefan@stefan-sonntag.com
Description Language
Implementation of a fault tolerant search to find services offered by TÜV-Hessen.

After selecting the desired service the closest center to the users home is selected through a geographic search that uses longitude and latitude information.

The Employees of TÜV-Hessen can administrate the services by uploading an excel sheet or via a web interface. 		JSP/Perl
Installation of a newsletter system for BIFAB and their publishers Duden, Brockhaus and Meyer with the OpenSource software Sympa.

Enhancing Sympa to gather statistical information about subscriptions and unsubscriptions.

Implementation of a web interface to administrate the subscribers and to view the statistics. 		Perl/PHP
Weblinks:

Visitors of the website from Brockhaus can search in a directory of web links with various topics.

The visitors can suggest new links. Brockhaus employees can enable the suggested links with an web interface.

The links can be exported and imported as an Excel sheet.		 PHP/Perl


   
StefanSonntag C++, Java, Perl, PHP-native speaker