back-end system
nounUK /ˌbækˈend ˈsɪstəm/
US /ˌbækˈend ˈsɪstəm/
The back-end system is the hidden part of a computer program that does the hard work behind the scenes.
When you log in to a game, the back-end system checks your password.
OTHER MEANINGS
2. The part of a business that handles internal operations rather than customer-facing work.
The company moved its billing to a new back-end system.
3. The servers and software that store and process data for an app.
The app crashed because its back-end system was overloaded.
4. A computer system that supports other systems without being seen by users.
Engineers upgraded the back-end system to make the website faster.