Lukas Kahwe Smith
Lukas has been using PHP since before the turn of the century and speaking at conferences around the world since over a decade. He has his fingers in dozens of open source projects. Among other things he was the co-RM for PHP 5.3 and helped shape a lot of the processes in PHP core. These days he is mostly involved in the Symfony community, where he mostly focuses on REST integration as well as the CMF and PHPCR initiatives. He works for Liip AG in Switzerland splitting his time between management tasks and working as a developer in a team in Zurich.