I am an Assistant Professor at the Web Information Systems group, Delft University of Technology. Between 2011 and 2012 I worked as Postdoc in the same group, conducting research in the scope of the ImREAL project. I received my PhD from the University of Twente, where I worked in the Human Media Interaction group. The Otto-von-Guericke University of Magdeburg in Germany was my home during my undergraduate years as a student in computer science. In the past, I have worked on a variety of topics in the fields of information retrieval (IR) & data science, including query performance prediction (the topic of my PhD thesis), social search, computational social science, learning to search and IR for specific user groups (e.g. children). I have diverse research interests and am always happy to dive into a new area. Together with three PhD students I am supervising (Guanliang Chen, Yue Zhao and Dan Davis), I am currently focusing heavily on large-scale learning analytics and how to incorporate search into the learning process at scale. TU Delft is a very active provider of Massive Open Online Courses (MOOCs) on the edX platform, which provides a rich experimental playground; ultimately, I (and the whole WIS Learning Analytics team) aim to provide insights and develop mechanisms to improve learning at scale. My research vision for the coming years focuses on two projects (MoSeS and BoOLE), connected through the MOOC use case.