Collins Aerospace is seeking a highly skilled and experienced Senior Software Engineer to support the development, sustainment, and maintenance of the custom co-simulation DESYRE application and framework. This role will drive technical excellence by ensuring robust backend architecture, delivering new features, and resolving critical defects. The engineer will serve as a technical leader, applying deep knowledge of computational models, hybrid system execution, and interoperability standards to advance aerospace engineering simulation capabilities. This is a hybrid role that requires proximity to a major Collins Aerospace site.