Back-end Developers
Back-end developers are those who pull the strings behind the scene. Their main areas of expertise are troubleshooting problems and processes that you can’t see but that affect your user experience. Back-end developers focus on databases, back-end logic, application programming interface (APIs), architecture, and servers, so websites and apps work properly. To achieve this, they operate in languages such as Ruby, C++, Python, Scala, and Java.