In my mind the distinction is there, but it's gonna feel arbitrary no matter what. If I had to make an attempt I'd describe the developer as someone who writes

In my mind the distinction is there, but it's gonna feel arbitrary no matter what. If I had to make an attempt I'd describe the developer as someone who writes code and the engineer as someone who writes the software level spec, sets the overall architecture/design, inputs on interface design and do declaration work (paperwork, really). I would assume most projects have people taking on both roles to certain extent.