Llewellyn is the founder and owner of Vast Development Method, an international application development firm based in Namibia.

He started out with Joomla in 2008 and over the years continued to advocate Joomla as the CMS for advanced systems. To this end he developed Joomla Component Builder (JCB) in 2014 and ignited a wave of rapid development of extremely complex components with Joomla.

Today hundreds of developers around the world use JCB as a key part of their development cycle.

As a volunteer, he is the current Joomla Extension Directory (JED) Lead, and the Assistant to the Joomla Production Department Coordinator.