Mattan Griffel

startups growth hacking marketing viral marketing design lean startup technology futurism education one month growth hacking one month coding viral hotmail entrepreneurship school edtech tips communication business love conversation steveslideshare mooc tech referral patrick ambron brandyourself mystartupstory one month rails rails ruby entrepreneur cassie lancellotti-young highrise growhack user acquisition keynote presentation slide show powerpoint state of the startup ux user experience productivity ruby ruby on rails web design and development