Ciarán is the CTO of busuu, a mentor, advisor, conference speaker and entrepreneur. Ciaran is CTO of busuu, the world’s largest social network for learning languages with over 35 million users from over 200 different countries. At Skimlinks he led the technical innovation for Skimlinks' products and the platform's infrastructure. Before joining Skimlinks, Ciarán worked in Ireland as Head of Engineering at one of the country's largest mobile communications companies. He also worked as a freelance developer before establishing Weeno Ltd, a web application and design company. Ciarán has been a Director of PHP London and the PHP UK Conference committee Chairperson.