Another SEG here (our title is Incubation Engineer now, my area is MLOps). It is true that we build on top of what others did. What we mean by single engineer group is that is a one-person-team: we are responsible from the end-to-end project, from defining the vision, to talking to customers, to implementing the solution, and delivering a product. This is a relative new team (a bit more that one year). https://about.gitlab.com/handbook/engineering/incubation/