Actually I am a software developer. This is what I have studied and I have been working in the field for over 20 years.
But 12 of these years I was working for a game company, where I have been involved in every aspect of game development, of course also heavily in the field of computer graphics.
So my interest in 3D graphics already has a long history, and so it came naturally that I use Blender for both, as a hobby and even for my current job, where I make architectural visualizations in 3D for our customers. Have look at the website of my company Binder Paramametric Metal !
However, I still do a lot of tutorials about making images in Blender, to learn it even better. Learning is never over !
The Iron Man images are rendered with the Radeon Pro Renderer for Blender, and indeed this is also a cool render engine !