Backend

In short: The backend is the part of an application that runs in the background on the server: logic, data, login, interfaces.

In more detail: Users do not see it directly. It processes requests from the frontend, accesses the database and delivers answers.

In Depth

Typical technology

Languages and frameworks such as Java, Python, Node.js, PHP. Interfaces via REST or GraphQL. Plus authentication, caching and background jobs.

Layers

Often divided into logic layer and data layer. See business logic, DevOps.

See also: Frontend, Database, Logic Tier, Data Tier