Mariusz Gil is architect and CTO focused on high performance and scalable web applications. Trainer, consulant and conference speaker. Co-founder of Source Ministry, PHP consulting company. He has been working for several companies on PHP projects for millions of active users, from biggest social network and instant-messaging software in Poland to multi-billion PV content personalization platform. Member of 4Developers, PHPcon Poland Programme Commitees and one of core members behind PHPers.