Exact same incident happened with me a week back. Macbook Pro 13 Retina 2015 model, same as yours, exploded.
I am also a computer programmer and music producer. I was working in Logic Pro X with Atom and MAMP open, charger was connected, suddenly white smokes, flames and weird hissing noise started coming out. I put the laptop on the floor immediately. It did burn the desk it was on and left flame marks there.
Still waiting for Apple Safety Team to update me on this, how much time did they take to replace your MBP? I have important data in the Hardisk and I am worried if I’ll be able to recover it.