Dawid Czagan (@dawidczagan) has found security vulnerabilities in Google, Yahoo, Mozilla, Microsoft, Twitter, BlackBerry and other companies. Due to the severity of many bugs, he received numerous awards for his findings. Dawid is founder and CEO at Silesia Security Lab, which delivers specialized security auditing and training services. He also works as Security Architect at Future Processing. Dawid shares his security bug hunting experience in his hands-on training "Hacking web applications - case studies of award-winning bugs in Google, Yahoo, Mozilla and more". He delivered security trainings/workshops at Hack In The Box (Amsterdam), CanSecWest (Vancouver), DeepSec (Vienna), Hack In Paris (Paris) and for many private companies. He also spoke at Security Seminar Series (University of Cambridge) and published over 20 security articles (InfoSec Institute). To find out about the latest in Dawid's work, you are invited to visit his blog (https://silesiasecuritylab.com/blog) and follow him on Twitter (@dawidczagan).