Aderen is seeking a Senior AI/Platform Engineer to lead architecture discussions and deliver a self-service Mosaic AI platform. You will work with delivery teams to translate requirements into scalable AI agent architectures and governance. This is a long-term freelance role with a fully remote setup in Spain. The role demands deep Mosaic Mosaic AI expertise, strong Python skills, and experience with foundation models and multi-agent systems. Fluency in English is required.