A CrashPlan developer works on the CrashPlan software, a data protection platform that provides secure, automatic, and continuous backup for businesses. They code and debug the application, ensuring its efficient operation. Their responsibilities include developing new features, maintaining the system, fixing bugs, and improving system performance. They work on enhancing the software's user interface and user experience. They also collaborate with other teams to integrate CrashPlan with various platforms, ensuring seamless data backup and recovery. Furthermore, they ensure the software meets security standards to protect users' data. They may also provide technical support to users.