• FoxVision is a tool to manage your personal finance

• OTC, Order To Cash, is an application developed by T-Systems MMS to track the whole process of an order,
  starting with a customer request, over the order and change management up to billing and invoicing.

• Development of an application to let private persons deliver post

The KION GROUP is building myLife (my Linde Fleet Expert). It is supposed to enable clients of Linde to view statistics about their fleet.

Responsibilities:

• Frontend app development with AngularJS
• Middleware development with Java EE and Spring MVC
• Communication with SAP development team
• Scrum methodology

The german press agency has an internal and an external redmine instances running. These two instances should be merged into one.

Responsibilities:

• investigating alternatives of how to do the merge
• investigating risks associated with the merge
• writing a script to do the actual merge
• ensuring the merge does not interfere with the day-to-day business

• Development of a piano course for a musician. See here for a live demonstration

• It was time for a new version of my website
• By using Twitter Bootstrap 
• I hardly had to do any designing
• I decided to go with Twitter Bootstrap because compared to ZURB Foundation it better designed elements, a larger community, and with bootswatch an easy way to change the theme of the site
• Since I already wanted all projects to be listed on the website
• I decided to also create a cv.html with a nice print layout
• This way, my CV stays up to date together with my website
• The website is still hosted on Amazon S3 which costs me around 10 cent per month
• By relying on great open source software like Twitter Bootstrap and jekyll, the development of the new version took very little time

The Institute for Neural Computation of the Ruhr-University Bochum wanted a CMS in Ruby on Rails that can be adjusted to their needs. Requested features included:

• bibtex import
• management of news, users, jobs, publications, courses and various thesis and projects
• repeating events
• access control
• original theme, breadcrumbs, etc

Responsibilities:

• communication with client and stake holders
• managing and supporting the development team
• quality and complexity management
• technology evaluation and decision

Highlights:

• simplifying the permission system, which reduced development costs and improved stability
• simplifying the bibtex import, which also reduced development costs and improved stability
• introduction of Docker (https://www.docker.com/), which reduced deployment and maintenance costs

lexoffice.de is a web-based solution for digital invoicing and accounting used by small businesses and freelancers. Haufe Lexware has a wide suite of tools (HL%20tools) around accounting, invoicing, resource planing and payroll accounting.

Responsibilities:

• coaching and support
  
  • Git
  • Grunt
  • frontend testing
• frontend refactoring
  
  • replacing the build tool ant with grunt
  • decoupling frontend from backend and database
  • reducing and updating JS dependencies
  • reorganization of code
  • replacing custom libraries with open source libraries (e.g. jQuery globalize (https://github.com/jquery /globalize))
  • adding frontend tests
  • enabling combination and minification for production

Haufe Lexware wanted to build and test a new kind job sharing platform: Sociapply. Sociapply should leverage social networks and thereby also reach people who are not actively looking for a new job.

Responsibilities:

• support of project manager
  
  • setting scope
  • evaluating competition and risk
  • estimating business case
• development of the platform to support fast adjustments to customer feedback
  
  • technology / architecture / infrastructure evaluation and decision
  • testing and quality management
  • documentation
• evaluating and support of additional technical staff
• communication with visual designers / UX designers / support team / stake holders

The client, a real estate broker, approached me with a project he was trying to revive: He had a web application developed a couple of years ago, which enabled him to publish his properties. After refactoring some code and upgrading some dependencies, I got the app working again. Now the customer handed me a list of features he wished to see in the application.

These involved

• various types of properties, e.g. houses, apartments, lofts, offices, lots, etc
• various features depending on the type of property, like number of rooms, floor, building permit, etc
• search for properties and features, localized and with price range
• FTP server with user authentication
• acceptance of openimmo (http://www.openimmo.de/) format for data import by real estate broker software
• a backend for data administration

Due to the variety of fields of the properties, this would have been a perfect use-case for a NoSQL database like mongo db However, since we also wanted authentication on the ftp server the easiest way was pure-ftpd in combination with postgreSQL, since it already has support for it built in. We had to patch pure ftpd to support salts in the user fields, but this was a minor change compared to introducing mongo db support. As backend, we used rails admin, since it is a simple drop-in backend and provided all the features the client was looking for

• Supervision of the implementation of the new version of weds.de

• Upgrading Redmine Instance from 1.1.1 to 1.4.4 and developing several plugins and patches for dpa's needs.

• Development of a prototyype of a designer platform

• Development of a Facebook Application for Taft / Schwarzkopf