A systems developer designs software applications and computer systems for business use. Your job duties as a systems developer include designing system architecture, developing applications, testing projects prior to deployment, debugging and troubleshooting issues, and providing regular maintenance and fixes for computer applications and systems. The qualifications you need for a career as a systems developer include a bachelor’s degree in computer science, the ability to write code in a variety of programming languages, problem-solving skills, and experience working in the information technology space.