Definition:
Conway’s law is an observation that the design of any system is significantly affected by the communications structure of the organization that develops it. The law is based on the reasoning that in order for a software module to function, multiple authors must communicate frequently with each other.Therefore, the software interface structure of a system will reflect the social boundaries of the organization(s) that produced it, across which communication is more difficult.
Further Reading:
Book: The DevOps Handbook by Gene Kim, Jez Humble,Patrick Debois.