software is a useful skill during a war. The same way you probably wouldn't send a doctor to a fight as the doctor is more useful to help with the wounded, a software engineer with an infosec background(as I assume the lead dev of graphene would) could be extremely useful to the war.
Software is a common skill, especially among military-age men. Probably around 5% of those employed in that group have software-related jobs. Doctors are rarer, and they also need more training to become productive, which makes them harder to replace than software developers.
You can argue that a specific individual has specific skills and experience that make them more valuable to the country in a non-fighting role. But software developer is just another common job.
