References

What Are Our Results?

This is the fourth of the “five crucial questions” Peter Drucker asks in one of his works.

You will also be most interested in the results we can achieve together.

My references are the results I have delivered and influenced for my clients and employers in the past. I will also show you the tools that were used in the process.

System Architecture and Platform Operation

• ISO-27001 Initial Certification

  2022

  Xempus AG

  Confluence, Comala Workflows, Scroll, draw.io, Jira

  The ISMS is certified according to ISO-27001 for the first time; there are no deviations in the audit.

• Bachelor Thesis

  2021

  Brandenburg University of Applied Sciences

  LaTeX, gitlab, Scribus

  The Bachelor’s thesis on IT-Grundschutz for Container Platforms was defended and the Bachelor of Science (B.Sc.) examination passed with the grade 1.2 (A).

• Backup Location for Disaster Recovery

  2019–2021

  Xempus AG

  The technical due diligence (TDD) for a funding round has been successfully completed; a low-cost backup location disaster scenarios at a second provider is available; a systems operations team is established.

• SaaS platform according to BSI IT-Grundschutz

  2018–2019

  Xempus AG

  A new operating platform in a Tier 3 data centre modelled according to BSI IT-Grundschutz is in use; the SaaS platform and central productivity services have been fully migrated during operation.

• Berlin Location with ISO

  2016–2018

  Xempus AG

  The new Berlin City-West site is up and running; a dedicated development team for the B2C offer has been established; a highly experienced Information Security Officer (ISO) has been recruited and appointed.

• Platform Migration

  2011

  formulor GmbH

  Lua

  Legacy data is usable on a new platform.

• Consolidation of the IT Infrastructure

  2011

  merconic GmbH

  C, Lua, PHP, PostgreSQL, Apache, qmail, Solaris, Linux

  The IT infrastructure has been renewed, legacy systems have been replaced.

• Consolidation of the IT Infrastructure

  2011

  Gigant Printworks Bildproduktion GmbH

  OS X, Windows XP, Xen, Linux, Tru64 Unix

  IT infrastructure is easier to maintain.

• Cryptography and Stabilization

  2011

  simfy AG

  Java, Wowza Media-Server

  Edge servers run error-free and stable with encryption.

Software Development

• Workforce Planning Platform

  2014–2016

  Jubbr AG (CH)

  nginx, Lua, PostgreSQL

  The prototype of a platform for the scheduling and placement of short-term jobs is used at a large festival.

• Mobile Beverage Capture

  2014

  Openair Frauenfeld (CH)

  nginx, Lua, PHP, PostgreSQL

  The mobile capture system for beverages “nullage” makes ullage and individual sales visible.

• Portfolio and Round-Trip Testing

  2014

  anonymous customer

  Java, Hibernate, POI, Oracle SQL, Apache, NetBeans

  Portfolio and round-trip testing can be used with the new service provider; the quality of the code base is measurably better.

• Coaching BONUS funding

  2013

  xefas UG (limited liability)

  The establishment of a company and the preparation of a business plan are funded by the IBB.

• Logging for Wowza Edge Server

  2012–2013

  simfy AG

  Lua, C, nginx, syslog-ng, graphite, Java, Wowza Media-Server

  Streaming audio edge server accesses can be visualized and errors identified.

• Control Element for Smart Power Grid

  2012–2013

  Bethke et al. GmbH

  armhf platform, Raspbian, C, Lua, GT.M, REST

  Prototype “smart grid” elements can optimize the use of combined heat and power plants and heat pumps.

• Support 3D Builder

  2011–2012

  Herrenschmiede GmbH

  PHP, CSS, JavaScript

  A website for custom shirt configuration is provided on schedule.

• Statistics Module and Double Opt-In

  2011

  anonymous customer

  Java, Hibernate, POI, MySQL, Apache

  A statistics tool provides faster insight into local sales; the platform is legally compliant using a double opt-in solution.

• Print-on-Demand Platform

  2007–2014

  seen.by GmbH

  C, Lua, HTML, CSS, JavaScript, CDB, Xapian, PHP, Drupal, MySQL

  The photo gallery and print-on-demand platform seen.by is well established in the market.

• Performance Optimization

  2006–2007

  Deutschlandrock

  C, Lua, PHP, MySQL, Lighttpd, Apache

  The award-winning website designklicks.de can fully serve the traffic from the first position on the homepage of spiegel.de.

• Online Gaming Platform

  2003–2006

  GameDuell GmbH

  Java, Struts, Tiles

  The online gaming platform gameduell.de wins its first major round of funding and establishes itself on the market.

• Efficient Subscription Stores

  2002–2006

  SPIEGEL Group

  Java, JSP, HTML, CSS, ISIS

  The Spiegel, manager magazin, and Harvard Business Manager subscription stores can be managed efficiently and data traffic can be handled cost-effectively.

• OWASP Website, WebGoat, VulnXML DB

  2002–2003

  OWASP Foundation

  Java, JSP, XML

  The Open Web Application Security Project (OWASP®) is able to improve web presence; the web application WebGoat, which was intentionally made insecure for training purposes, is given its name, which is still known today; the OWASP Common Library (Java) is made available; sponsorships for the development of the VulnXML DB are acquired.

• Open Source CDS/ISIS Implementation

  2002–2003

  OpenISIS

  C, Java, tcl/tk

  An open source database compatible with the proprietary CDS/ISIS format can be used on Linux.

• Corporate Shop

  2001–2002

  merconic GmbH

  Java, JSP, HTML, PostgreSQL

  Corporate stores can be used to sell decommissioned equipment to staff.

• Student Shop

  2000–2001

  merconic GmbH

  Java, JSP, HTML, Oracle

  In the allmaxx.de web store, students can buy high-quality computer hardware and software at discounted prices.

• Data Analysis on the PC

  1997–1998

  University of Siegen, Department of Physics

  C++, MFC, Fortran

  The Data Analysis GUI software can be used under Windows.

• Ordering System for Pizza Service

  1996–1997

  Charley's Pizza Profis

  Delphi, ODBC

  Orders can be entered electronically and customized.