BigDat 2015 is a research training event for graduates and postgraduates in the first steps of their academic career. It aims at updating them about the most recent developments in the fast developing area of big data, which covers a large spectrum of current exciting research, development and innovation with an extraordinary potential for a huge impact on scientific discoveries, medicine, engineering, business models, and society itself. Renowned academics and industry pioneers will lecture and share their views with the audience. [...]