Interoperability and convergence are two key features of any working sociotechnical infrastructure that includes a plurality and multiplicity of communities of practice using technologies. However, as information systems scale up and the heterogeneity of users increases, it becomes challenging to actualise interoperability and convergence. When it comes to welfare services, the development of interoperable information systems and converging communities of practice is key to the quality and efficiency of services, both for practitioners and users. This paper elaborates on these concepts and their practical relevance by presenting and discussing data from a research project on ageing and welfare technology in Sweden. A participatory approach is meant to act as methodological support for the actualisation of interoperability and convergence even though socio-organisational and political constraints cannot be fully overcome once for all.