Datum is, from its Latin origin, a singular form of data, and may refer to a single item of data. 1 Singular data point.
Front-end developers are responsible for a websiteâs user-facing code and the architecture of its immersive user experiences. In order to execute those objectives, front-end devs must be adept at three main languages: HTML, CSS, and Javascript programming.
Back-end focused. 1  Scripting languages like Nodejs, PHP, Python, Ruby, or Perl. 2  Automated testing frameworks for the language being used. 3  Database administration. 4  Scalability. 5  Security concerns, authentication and authorization. 6  Data transformation. 7  Backup methods and software.