A Software Engineer is a professional who designs, develops, tests, and maintains software applications or systems. They apply engineering principles and programming languages to build efficient, scalable, and reliable software solutions. Key Responsibilities: Write clean, efficient, and well-documented code. Design software architecture and systems based on user needs. Debug, test, and troubleshoot software applications. Collaborate with cross-functional teams (e.g., designers, product managers). Participate in code reviews and agile development practices. Maintain and improve the performance of existing software.