At the seventh European Workshop on Software Ecosystems, the research on software ecosystems and platforms proved to be advancing very well. Goal of this workshop is to:1.bring together the software ecosystem and platform ecosystem research community from all over Europe and2. share, present and discuss their latest research with business software industry experts. Researchers and Presenters:New Ecosystem Opportunities & 'White space' Opportunities in Software and High-Tech Data Economy, Platforms and Privacy Peter Buxmann (TU-Darmstadt)New Cloud-Based Ecosystem Opportunities for Digital Business Thomas CurranUberization of field service Sebastien Dupre (SAP SE)Panel on Network Effects, Data Effects & AI - Keys to the castle John Rethans (Apigee/Google)Ecosystem Driven Development Slinger Jansen (University of Utrecht)Design patterns for business success for software platforms and ecosystems Ralf Meyer (Synomic)