Goweb is the most recent Portuguese company to raise the knowledge of its employees, acquiring the certification "Zend Certified Engineer."
There is the complexity of this certification looking for their numbers, because according to the official site of the Zend (www.zend.com), there are just a few people with that certification, demonstrating the high level of complexity.

The Zend Certification provides an excellent measure of distinction for developers in PHP 5 and Zend Framework. Once the exame is done the person becomes certified in skills and expertise that are related to the real world and its function, allowing the employer to technically differentiate its company, the operational knowledge.