Costin finished his Ph.D. at UCL in 2011. His current research focus is on network verification. In his past work, Costin was one of the main people behind the development, implementation, and standardization of Multipath TCP, a protocol that is now deployed by Apple and Samsung on their mobile devices. Recently, Costin worked on NDP, which is a radical redesign of the data center networking stack (Sigcomm 2017).
Correct Networks is a recently-created spin-off of UPB that aims to develop and commercialise products based on the research of the Netsys group. It is now working on developing products for serverless packet processing services within the Unicore EU project.