An application developer designs, creates, and supports applications for computers or mobile devices. They analyze user needs, develop software solutions, and ensure seamless functionality. Developers often specialize in a specific development area, such as mobile app development, graphic software development, or data science. They're involved in the full creation process, from concept and design to testing, troubleshooting, and final rollout. They work with programming languages like Java, C++, and Python. Furthermore, they collaborate with other team members, including software engineers and data scientists, to improve the quality and functionality of applications. They also fix bugs and improve usability.