A Ghostscript developer works on the Ghostscript software, an interpreter for Adobe's PostScript and Portable Document Format (PDF) page description languages. They develop, test, and debug code, improving the software’s functionality and performance. They also work on managing the conversion of PostScript language files to many other formats, and vice versa. Other tasks may include writing scripts for batch processing, creating graphical user interfaces, and integrating Ghostscript with other software. They also ensure the software is compatible across various operating systems, and often interact with the user community to provide technical support and gather feedback for improvements.