In nature, quorum sensing is one of the mechanism bacterial populations use to communicate with
their own species or across species to coordinate behaviours. For the last 20 years, synthetic biologists
have recognised the remarkable properties of quorum sensing to build genetic circuits responsive to
population density. This has led to progress in designing dynamic, coordinated and sometimes multicellular systems for bio-production in metabolic engineering and for increased spatial and temporal
complexity in synthetic biology. In this review, we highlight recent works focused on using quorum
sensing to engineer cell-cell behaviour.