Tech Leader and Staff Developer with more than 20 years of experience in Java/JEE with excellent Knowledge of Spring framework and Enterprise Architecture Design. I've managed several teams in mission impossible projects. I am also a speaker in many conferences regarding the technologies mentioned above and I trying my best to contribute to open source projects. I am also a Certified Scrum Master. I am also the founding Member and admin of the largest Developers and Designers Group in Greece with approx. 15.000 members.