Too Long; Didn't Read
Full Stack development professional is the one who is having sound technical knowledge of each aspect of development — front end, back end, various operating systems among other details of the technology. Full-stack developers can create any complex application from scratch, provided they would have understood how each technical layer should interact with the other. Front End Development deals with the application parts that the users can see and interact with. Back End Development handles the database operations, user authentication and application logic (Yeah, all the complicated things!)