To be honest, I never understood how this "DevOps vision" could scale up to an engineering department bigger than, let say, 10-15 people. At some point there are enough things to do to keep the platform working by itself to move dedicated hours from business code to platform/infrastructure code. So you can decide if you use developers time or bring in someone dedicated to this. But maybe all the developers like the OP are 10x developers that can just do everything without skipping a beat.