An applications developer, often referred to a software applications developer, designs and produces software for smartphones and tablets. As an applications developer, you typically work as part of a development team, and your duties include working with clients and other departments at your company to produce an app that is polished and ready for public use. Qualifications needed for the job include a bachelor’s degree in computer science or a related subject and experience with various programming languages. You should be comfortable with all of the major mobile operating systems, as a successful app should work on both Apple and Android. Software development skills are essential.