A mobile application developer designs programs and apps for use on smartphones, tablets, and other mobile devices. These skilled computer professionals develop solutions on popular mobile platforms, such as iOS and Android, as their main job duty. Your software is typically made available through the Apple Store and the Google Play Store. Apps downloaded to the mobile devices are designed to perform various functions, allow for game play and entertainment, or assist with life goals. You need experience with a variety of programming languages and development platforms for this job.