The authors of these papers participated in the RecSys Challenge 2016 by designing and implementing recommender system algorithms for job recommendations. The challenge dataset was provided by XING, a business-oriented social network with approximately 18 Million users worldwide, more than half in German-speaking countries. The challenge had the following formulation: given a XING user, the recommender algorithms had to predict those job postings with which that user will interact (e.g., click or bookmark).