Daniel Hahn is CTO and developer at betterplace.org, where he earns good Karma by helping social projects getting funded. This involves developing software with Ruby, Rails, Coffeescript and other technologies. Before that, he worked with different small software companies in Germany and Italy. He also keeps in touch with the Berlin hacking scene, and is always interested in learning something new. He has given Rails courses as a guest lecturer at the University 13 in Paris.