Steffen Macke is a Civil Engineer and Software Developer. After several years of work on water supply projects in the Middle East, he’s now back in Germany and has joined the software industry.

Maps and Geographic Information Systems (GIS) played a key role in his hydraulic analysis and customer database activities. They served him as an entry point to the world of programming, relational databases, version management systems, and web technology. The complexity of the projects he encountered made him embrace diversity, active communities, and practical approaches. That’s why he doesn’t have a favorite programming language, operating system, or database management system.

Steffen is actively involved in a number of open source projects, among which the general purpose drawing software Dia is the most popular (http://dia-installer.de). His passion for open source does not mean that he’s ignorant to the advantages of commercial software development models, he believes that they’re great to make a living. If you’re interested in Steffen’s views and projects, make sure that you visit his website http://sdteffen.de.

Alvaro Tejada Galindo worked as a Senior ABAP Consultant for 11 years, then he moved to SAP Labs in Montreal where he works as a Development Expert. Besides his SAP background, Alvaro is very proficient in scripting languages like PHP, Python, Ruby, and R and considers himself to be a regular expressions hero.

Alvaro has worked in Peru and Canada for some of the best consultant companies, namely Stefanini IT Solutions, ActualiSap, and Beyond Technologies. Presently, he is working for SAP.

Alvaro has published several programming books on http://www.lulu.com/spotlight/blag.

Alexey Tveritinov graduated from Moscow State University of Informatics and Craftsmanship in 2008. After that he was hired by NVIDIA in a GPU and driver testing team as Junior Software Engineer, where he undertook development of various tools for tests automation and performance measurement. After spending one year at NVIDIA he left the company as his work on the software had finished, and he wasn’t involved in other developments.

After that he was hired by a medical company named Trackpore Technology where he developed embedded software for plasmapheresis medical units using Linux and C++.

In 2011, he was hired by SAP CIS as Developer Associate and started to work on implementing the framework for XML reports according to specifications of legal units of Russia, Ukraine, and other CIS countries, without the limitations of DMEE.

Eric Wildenstein is a SAP independent Consultant, who has been working on ERP implementations for blue chip companies in Western Europe and North Africa regions since 1997. He mainly specializes in ABAP Object programming, NetWeaver XI/PI and SAP Business Workflow, providing technical expertise across the core business modules of SAP. Prior to being self-employed in 2000, he worked as an in-house Programmer Analyst on behalf of PricewaterhouseCoopers, U.K. and Andersen Consulting, France, on both SAP R/3 and C/S architectures.