How do security technologies shape border management? Who develops these technologies, and who makes decisions about when and where to deploy them? In this episode of the Sociotechs Podcast, Bruno Oliveira Martins explains the processes by which different technologies contribute to the securitization of migration and how EU externalisation policies are becoming increasingly digitalised. The conversation evolves around research carried out at PRIO dealing with the co-production of security “problems” and “solutions”, digital border management, and the production of security knowledge and expertise that shapes border policies.