A Software Engineer is a professional who designs, develops, and maintains software applications. They use programming languages like Python, Java, or C++ to create programs that help computers perform specific tasks. Their work can range from building mobile apps to developing complex systems for businesses. In addition to coding, Software Engineers often collaborate with other team members, such as project managers and designers, to ensure that the software meets user needs. They also test and debug their code to fix any issues, making sure the final product is reliable and efficient for users.