The Center for Socio Political Data (CDSP) created the ELIPSS web panel in 2012. Its probability-based sample and scientific purpose made the project the first of its kind in France. Its mobile web dimension made it the first in Europe. The CDSP’s IT Team conceived and developed several survey panel tools for ELIPSS. For example, to support multi-channel interactions between the panel members and the panel managers, a set of features managing phone calls, electronic and traditional mail, text messages, and in-app notification messages were developed and integrated to the ELIPSS application suite over time. These interactions were captured in a massive set of raw data. We’ll begin the workshop with a brief tour of the ELIPSS in-house application system. One of the challenges we dealt with was an important HR turnover. We’ll give a feedback on the best practices we implemented in order to render the processes more fluid and assist the CDSP teams capture and release the data, DDI metadata and paradata of the project in due time. A DDI metadata creation exercise, to describe a paradata file, will end the first block of this session. The workshop will continue with a paradata visualization experiment. As previously mentioned, the ELIPSS application suite recorded the online and offline interactions between the panel managers and the panelists. Thus, a massive set of raw data were collected. We’ll provide further insight on the curation and DDI-C metadata creation process we went through to manage a ready-to-use paradata set. We’ll then invite participants to join a collaborative Jupyter Notebook to analyze and visualize it. No previous knowledge of the DDI standard is required to participate. This workshop is based on an experience of more than a decade of producing data and metadata collection tools and repositories at the CDSP.