Tobias Schlitt has a degree in computer science (German "diplom") and works for more than 10 years in professional web projects on basis of PHP. As an open source enthusiast, he contributes to various community projects. Tobias is a co-founder of Qafoo GmbH (http://qafoo.com), which helps people around the world to produce high-quality PHP code. This includes e.g. consulting and training on quality assurance and professional software engineering, as well as technical support for several PHP QA tools and the Apache Zeta Components.