A KSP (Kerbal Space Program) developer designs, builds, and maintains video game elements for KSP, a space flight simulation game. They create code, troubleshoot bugs, and develop new features or game mechanics to enhance gameplay. They work closely with designers and artists to implement visual and interactive elements, ensuring they function correctly within the game's physics engine. They also collaborate with other developers to maintain code quality and consistency. Furthermore, KSP developers often interact with the game's community to gather feedback and make necessary improvements, ensuring an engaging player experience.