gavin-king-ceylon-voxxeddays-istanbuljug Rahman Usta13 Temmuz 201513 Temmuz 2015 About Rahman Usta Java* Trainer and Author. JCP Expert, Istanbul JUG lead and Adopt a JSR member. Duke's Choice Award 2015 winner (AsciidocFX). Ex-voxxedistanbul organizer View all posts by Rahman Usta→