A Cross Compiler developer designs and builds compilers that transform code written in a programming language into a format executable in a different system architecture. This involves understanding diverse programming languages, system architectures, and operating systems. They also manage issues related to compatibility, efficiency, and optimization in cross-compilation processes. Additionally, they debug and fix issues that arise during code conversion, ensuring the resulting program maintains its functionality. Furthermore, they update and enhance the compiler to support new languages or system architectures. They work closely with other software developers, ensuring seamless integration of cross-compiled applications.