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A back-end developer is a type of programmer who creates the logical back-end and core computational logic of a website, software or information system. The developer creates components and features that are indirectly accessed by a user through a front-end application or system.
Back-end developers primarily develop and maintain the core functional logic and operations of a software application or information system. Typically, a back-end developer has expert programming skills in C++, C#, Java and other high-level programming languages.
The key job role of a back-end developer is to ensure that the data or services requested by the front-end system or software are delivered through programmatic means. Back-end developers also create and maintain the entire back-end of a system, which consists of the core application logic, databases, data and application integration, API and other back-end processes. Moreover, a back-end developer performs the testing and debugging of any back-end application or system.