back end
adj.adj. relating to the parts of a computer program or website that the user does not see. It usually involves the database and the server that make the system work.
adj. relating to the server-side or internal logic of a software application, responsible for data processing and storage. Often used attributively to describe infrastructure that supports the user-facing interface.
The back-end developer is fixing the database error.
While the website looks beautiful, the back-end systems need to be upgraded to handle the increase in traffic.
A robust back-end architecture is essential for ensuring that data remains consistent across multiple platforms while maintaining high security standards for sensitive user information.
Typically used attributively before a noun; can also be used as a noun to refer to the system itself.