In your opinion what’s the difference between the two? In my opinion both terms are frequently used interchangeably in the workplace.
But I’d like to consider myself as an engineer, because although I don’t consider myself to be good at it, I think I cares about the software that I worked on, its interaction with other services, the big picture, and different kinds of small optimizations.
I mean, what is even engineering?
The research is the interviews he did with engineers. That sentence is obviously a simplification, especially since he immediately follows it with one about talking to a civil engineer who builds mines.