References

Unfortunately, I cannot list all the projects I have worked on. On the one hand, I have worked for subcontractors who had agreed to maintain secrecy with the client, on the other hand I am bound to secrecy for other projects. Nevertheless, here you will find a small list of "public" projects that I may mention here.

This reference list is output without navigation when using the print function.
The customers/clients can be clicked to display only the corresponding projects.
The filtered output of a project list with a specific technology is possible via » Technologies.

Academy GmbHARM GmbHBank-Verlag GmbHBerg Data AGBFL GmbHBoST GmbHBreuer Nachrichtentechnik GmbHBruno Media GmbHBurda Media Publishing KGCEWE Stiftung & Co. KGaACompuGroup Medical AGDER-Tours GmbHDeutsche Bahn AGDeutsche Verkehrswacht e.V.EQS GmbHEscal Software GmbHFord Automotives AGGira Giersiepen GmbH & Co. KGGruner & Jahr AGInfox GmbHInterOne GmbHiplabs GmbHKlett Verlag GmbHmed medicine online GmbHMetaflake GmbHMicro Computer Weber GmbHMphasis Europe B.V.MVR GmbHNetzpool GmbHnutzfahrzeugfinder GmbHProximity GmbHReality Bytes GmbHRoche AGSamsung Mobile AGSanofi Aventis GmbHSST GmbHStar Healthcare Management GmbHSwyx Solutions AGtargit GmbHtechnidoo UGThomson CSFTravix GmbHVisteon AGVitaphone GmbHVolkswagen AGVondar IO Ltd.Wolf & Simonis GmbH

Customer consulting and training at a computer retailer

Software: ARM-610 Risc-Assembler

Hardware: Acorn Archimedes Risc-Computer, Reparaturen PC-Kompatible

Client/end customer: Micro Computer Weber GmbH

Period: 1987

Porting "Giana Sisters" in coproduction

Software: Desktop application, Graphic programming, Game programming

Client/end customer: Escal Software GmbH

Period: 1988

Design and programming of a travel booking portal

Complex determination of suitable trips and total prices from given departure and arrival data.

Software: CSS, Database modeling, Html, JavaServer Pages JSP, Perl, PHP, Web application

Hardware: IBM-PC compatible

Client/end customer: Travix GmbH, DER-Tours GmbH

Period: 1992

Implementation of an archiving system

Complete development of a document archiving system, master/multi-slave architecture, scanner connection

Software: BTrieve database, Desktop application, Netware network programming, Visual Basic

Client/end customer: Wolf & Simonis GmbH

Period: 1995

Sensor evaluation for hot runner safety system

Multi-threads, quasi real-time, high error redundancy, multi-master, multi-slave

Software: C++, Visual C/C++

Client/end customer: SST GmbH, Deutsche Bahn AG

Period: Oct. 1997 – Apr. 1998

Racing car engine control prototyping

Rush order prototype construction including coordination of project management

Hardware: Analog Technology, Design of complex control systems, Electronics development, Circuit board layout

Client/end customer: Visteon AG, Ford Automotives AG

Period: Feb. 1998 – Mar. 1998

Contract development for a biometrics manufacturer Fingerprint

Hardware development PCI-card/sensor technology, real-time image driver.

Software: Ansi C, Image processing techniques, C++, Turbo Pascal

Hardware: Design von PCI-Karten, Electronics development

Client/end customer: Berg Data AG, Thomson CSF

Period: 03.06.1998 – 25.11.1999

Business Channel

Integration of the content management system "open market" to combine 5 websites (Börse-Online, Impulse, Finanzen, Capital, Bizz) into one large web portal "Business Cannel"

XML interface design and control for content delivery, data porting SQL, project documentation and partly coordination, consulting activity: technical/management

Software: Content management CMS, Documentation, Html, IPS/Openmarket, Java, JavaServer Faces JSF, JavaServer Pages JSP, Open Market Content Management, Perl, Interface specification, Web application, XML

Client/end customer: BFL GmbH, Mphasis Europe B.V., Gruner & Jahr AG

Period: 01.10.2000 – 31.12.2000

Freelancer intranet medical practice software/health card

Debugging of the entire software and implementation of a uniform system-wide printing concept.

Software: ASP, Desktop application, Html, MS-Sql, MS-Transaction Server

Client/end customer: med medicine online GmbH

Period: 01.05.2001 – 30.09.2001

Vehicle sales portal Nutzfahrzeugfinder.de

Agency portal (à la AutoScout24) for the sale of commercial vehicles of all kinds.

Flexible parameterized search engine, extensive database of all commercial vehicles, login area for vehicle suppliers, administration area

Software: Apache Web-Server, Image processing techniques, Content management CMS, Database modeling, Html, J2EE, Java, JDBC, JEE, Linux, Linux Administration, PHP, Postgres, Interface specification, Security, Tomcat, Web application, Web-Templating

Client/end customer: nutzfahrzeugfinder GmbH

Period: 23.05.2001 – 15.07.2002

EMail game content management system/access rights

ALWS specification and implementation

Software: Content management CMS, Database modeling, Document-Processing, Documentation, Java, JDBC, Interface specification, Web application

Client/end customer: BoST GmbH

Period: 19.09.2001 – 17.10.2001

Web based content management system

Realization of a web based content management system for the "learning workshop" with a flexible categorization of the articles and mapping of different categories on the page navigation.

Content management system developed on behalf of a customer, which optimally supports the freely graduated navigation of the traffic education portal Lernwerkstadt. The result was a thematically indexed filing of articles. The articles are delivered by cleverly combining several topics. The content-related categorization makes it possible to change or refine the navigation without any effort. A flexible description language for the delivery of the articles enables quick adjustments to the different designs or color spaces within the presence. These design templates are also maintained within content management. Java servlets and a Sql connection to Postgres and MS-Sql servers are used. The presence implemented by the customer calls up the article view and the right teaser area. These areas are delivered completely prepared.

Software: Content management CMS, Java, JavaCC, JavaScript JS, Java Servlets, JDBC, MS-Sql, Postgres, Web application

Client/end customer: BoST GmbH, Volkswagen AG, Klett Verlag GmbH, Deutsche Verkehrswacht e.V.

Period: 17.08.2002 – 13.09.2002

Co-development of a CRM system for industry and wholesale

Data connection and graphical user interfaces including complete networked appointment management with optically sophisticated calendar. Data export and printing of invoices through document processing via Postscript or PDF.

Software: Apache FOP, Desktop application, Document-Processing, J2EE, Java Swing, JEE, MySql, PDF, PS, SAP environment, XML-FO

Hardware: Scanner integration, Bar code

Client/end customer: ARM GmbH

Period: 02.06.2003 – 11.06.2004

Implementation CMS for the internet portal "Geldidee"

Complete restructuring and unbundling of the internet portal. Implemetation of the Typo3 content management system. Connecting external partners sites via Typo-Script.

Software: Content management CMS, Html, JavaScript JS, PHP, Rest, Typo3, Web application

Client/end customer: Bruno Media GmbH, Gruner & Jahr AG

Period: 01.07.2004

Development online photo book portal

Software: Java, Java Hibernate, JavaServer Pages JSP, Java Servlets, Java Spring, JBoss, PHP, Rest, Web application

Client/end customer: iplabs GmbH, CEWE Stiftung & Co. KGaA

Period: 01.03.2005 – 31.05.2005

Production control, connection to merchandise management

Software: PDF, XML

Client/end customer: Vondar IO Ltd.

Period: Oct. 2005 – 06.06.2006

Clexane trombose management programm

Software: Desktop application, Real Basic (structured)

Client/end customer: Academy GmbH, Sanofi Aventis GmbH

Period: 24.05.2006 – 29.11.2007

Realization of the internet portal Billig-Flieger-Vergleich.de

Implementation of the server-platform of a flight-price-comparison web-page. Accessing different datasources of the airlines and travel operators, consolidating and presenting for the user.

Parallel life queries of flight searches, consolidation of results (XML, CSV data), data handling and system administration. Support in the creation of the application and technical assistance in the operation of the popular portal: Cheap Flight Comparison. Here you will find a good overview of cheap flights and can compare all cheap airlines with each other.

Software: GWT, Html, JavaScript JS, JSON, Linux Administration, MySql, PHP, Web application

Client/end customer: Netzpool GmbH

Period: 13.07.2006 – 12.02.2009

Website "golf comparison"

Software: Content management CMS, PHP, Interface specification, Web application

Client/end customer: Metaflake GmbH

Period: 06.09.2006 – 22.12.2006

Avalox COPD-Tool

Software: Desktop application, Real Basic (structured)

Client/end customer: Academy GmbH

Period: 27.09.2006 – 27.06.2007

CSII-Expertise

Implementing medical diagnosis software (expert-systems), that supports doctors to choose the correct medication or technical equipment (COPD, CS-II, Hypertension).

Software: Desktop application, Real Basic (structured)

Client/end customer: Academy GmbH, Roche AG

Period: 26.01.2007 – 21.06.2007

Prevention Guide

Software: GWT, Java, Java Servlets, Web application, Web-Objects

Client/end customer: Academy GmbH

Period: 11.05.2007 – 10.12.2007

Hypertonie Documentation tool

Software: Desktop application, Real Basic (structured)

Client/end customer: Academy GmbH

Period: 31.05.2007 – 09.08.2007

Web based statistical system "Try And Play"

Software: GWT, Java, JavaServer Pages JSP, Java Servlets, JDBC, JSON, Oracle DB, Postgres, Web application, Weblogic

Client/end customer: Reality Bytes GmbH, Samsung Mobile AG

Period: 04.07.2007 – 07.02.2008

Coupling and single sign login of various components for the web-platform of "Young Woman’s Magazine"

Software: CSS, JavaServer Pages JSP, PHP, Rest, Sessiontracking, Web application

Client/end customer: Reality Bytes GmbH, Burda Media Publishing KG

Period: 31.07.2007 – 03.08.2007

CMS for dynamic generation of static pages

Software: Content management CMS, Java, JavaScript JS, web2obj, Web application, Web service, Web-Templating, XML

Client/end customer: Metaflake GmbH

Period: 10.01.2008

Consulting Vitaphone ISP2.0a - medication and MMI browser

Client/end customer: Star Healthcare Management GmbH, Vitaphone GmbH

Period: 14.11.2008 – 23.03.2009

Development of the "flying dinner" internet community

Software: CSS, Html, MySql, PHP, Web application

Client/end customer: Netzpool GmbH

Period: 15.11.2008 – 25.11.2008

Development "Queryserver"

Request flight data and fares from the various flight and travel providers. Official interfaces or allowed screen scraping if no export interfaces are available. Parallel life queries of flight searches, consolidation of results (XML, CSV data), data handling and system administration.

Software: Database modeling, Remote administration, Html, Java, Java NIO, JDBC, Linux, Linux Administration, MySql, ServerSockets, sFTP, Sockets, Web application, Web service, XML

Client/end customer: Netzpool GmbH

Period: 15.01.2009 – 12.02.2009

ICD/CRT Integration STAR Plus

Client/end customer: Star Healthcare Management GmbH

Period: 22.04.2009 – 22.06.2009

Print data personalization & PDF composition software

Realising a print data personalization software for transforming huge incoming travel-booking-reservations in different formats into complety assembled (composing/sorting) print jobs for producing booklets. Based on my PDF-composition-library from my photobook-prepress-server.

Software: Image processing techniques, Desktop application, Document-Processing, Prepress, DTP, iText, Java, Java Swing, JDBC, PDF, PDF-Templating, VIPP, web2obj, Web service, Web-Templating, XML

Hardware: Printing technology, Xerox Docucolor, Xerox IGEN

Client/end customer: Infox GmbH

Period: 01.06.2009 – 30.06.2017

Internet book price calculator for publisher/printing/bindery

Software: CSS, Html, JavaScript JS, JSON, PHP, Web application

Client/end customer: MVR GmbH

Period: 02.10.2009 – 29.12.2009

Android telephony app

Development of a native Android application realizing a viop-phone app for business-customers. Graphical impementation, new history management to act nearly same like IOS app. Synchronisation of phonecontacts/recents/favorites from server.

Software: Android, Ansi C, Butterknife, Dagger, Database modeling, Espresso, Glide, Http protocols, Jackson2, Java, Junit, Mockito, ReactiveX/RxJava, Retrofit, SIP Protocol, XML

Project management: GIT, Gradle, Jenkins, Maven, Scrum

Client/end customer: technidoo UG, Swyx Solutions AG

Period: 03.09.2015 – 02.12.2016

Certificate management

Software: Java, JavaScript JS, JavaServer Pages JSP, Java Servlets, JSON, PHP, Rest, Interface specification, sFTP, Typescript, Web application

Project management: GIT

Client/end customer: Bank-Verlag GmbH

Period: 09.10.2017 – 03.11.2017

Implementation of an UpdateManagement configuration system

Consolidation of customer data from SAP with information about the customer's IT infrastructure from an update package management system. Linking the update packages with the appropriate software suites licensed by the customer. Assignment of updates to the computer systems of the desired customers (groups). Comprehensive group and rights management, access filters at the various sub-companies of CompuGroup AG, detailed audit trail, 4-Eye confirmation and statistical evaluation of the installation status of the various software packages.

Software: Angular 6, CSS, Java, JavaScript JS, Java Servlets, JBoss, Jetty, MySql, ReactiveX/RxJava, SAP environment, Interface specification, SCSS, Typescript, Web application, Web service, Web-Templating

Project management: Confluence, GIT, Jira, Maven

Client/end customer: CompuGroup Medical AG

Period: 18.06.2018 – 28.09.2018

Further development of a house control app

Update to the latest Android version including migration of the push notification from Google Cloud Messaging (GCM) to Firebase Cloud Messaging (FCM). Code restructuring/modularization and inter process/module communication for more stability. Implementation of new features.

Software: Android, Java, Kotlin, Rest, Web service

Project management: CI/CD, Confluence, GIT, Gradle, Jenkins, Jira, Scrum, SVN

Client/end customer: Gira Giersiepen GmbH & Co. KG

Period: 01.10.2018 – 31.08.2020

High-Secure smart building update management

Software: JavaServer Pages JSP, Java Servlets, Linux, sFTP

Project management: GIT

Client/end customer: Breuer Nachrichtentechnik GmbH

Period: 15.07.2021 – 30.09.2021

Development of entry and processing of "hardship case" for authorities

Software: CSS, Document-Processing, Html, Java, JavaScript JS, Linux, Linux Administration, Lucom, SCSS, Tomcat, Web application, Web-Templating

Project management: Confluence, GIT, Jira, Maven

Client/end customer: Proximity GmbH

Period: 06.09.2021 – 30.11.2021

System Architecture Datawarehousing

Increase speed of the datahandling (min 100 times)

After analyzing the existing system landscape and creating a new system architecture, one data processing loop took 4 seconds only instead of the previous 22:40 minutes. This brings significant savings in the system infrastructure.

Software: Java, Java Spring, SQL

Project management: CI/CD, GIT, Jira, Maven

Client/end customer: targit GmbH

Period: 01.02.2022 – 30.06.2022

Frontend for document aggregation

CMS editor for updating a jusritic expert system from new given documents (PDF)

Update of a jusritic expert system from new given documents (PDF). Detection and merging of all changes (incl. new chapters and shifts). Clear display of conflicts and marking of all detected changes.

Software: Content management CMS, Desktop application, Document-Processing, Java, Java Swing, PDF, Interface specification, Threads

Project management: GIT, Jira, Maven

Client/end customer: EQS GmbH

Period: 15.11.2022 – 28.02.2023

Development of form system for governments

Software: Amazon Cloud AWS, Apache FOP, CSS, Docker, Document-Processing, Html, Java, JavaScript JS, Linux, Linux Administration, Lucom, oAuth, SAML Protocol, SCSS, Tomcat, Web application, Web-Templating

Project management: CI/CD, Confluence, GIT, Jira, Maven

Client/end customer: InterOne GmbH

Period: 01.06.2023 – 30.06.2024

» Please select an entry

Application

References