Explore a conference talk from NDC Oslo that delves into the practical application of Domain Driven Design (DDD) through a real-world case study at FINN.no and Schibsted Nordic Marketplaces. Learn how to effectively draw domain boundaries during significant organizational changes, including the merger of four marketplaces into a shared Nordic company and the transition from horizontal to vertical business structures. Discover the evolution of domain mapping as the organization navigated through historical boundaries, integrated new Nordic teams, adapted to fresh business directions, and aligned with vertical business units' independent strategies. Gain valuable insights into how different vertical business units approached domain boundaries and how the mapping process evolved to accommodate various stakeholders while supporting both immediate and long-term organizational objectives.