An open source developer contributes to freely accessible software whose source code is available for modification or enhancement. They design, code, debug, and validate software systems, often collaborating with a global community. They may propose new features, identify and fix bugs, improve functionality, or enhance the software's performance. Their work involves writing clean, efficient code and maintaining documentation for other contributors. They actively participate in discussions and decisions about the software's development. They also respect the principles of open source development, including transparency, peer review, and community-oriented decision-making, while adhering to licensing agreements.