A software developer is a professional who creates and maintains computer programs and applications. They use various programming languages, like Python or Java, to write code that makes software function. Their work can range from building websites to developing mobile apps, and they often collaborate with other team members, such as designers and project managers, to ensure the final product meets user needs. In addition to writing code, software developers also test and debug their programs to fix any issues. They need strong problem-solving skills and a good understanding of technology trends to stay current in a fast-paced industry.