Both software engineer and computer science, are involved with computer software, along with software development and other related fields. Those interested in a career centered on software development and computer technology often focus on one of two majors: computer science or software engineering (sometimes referred to as software development, but the two are not synonymous).
The primary difference is that computer science was originally a sub-branch of mathematics. Computer science deals with the basic structure of a computer and is more theoretical. Hence, it is more malleable in terms of specialization, with the emphasis on math and science. Software engineering is a field concerned with the application of engineering processes to the creation, maintenance, and design of software for a variety of different purposes. A software engineer designs customized applications per the requirements of an organization.