Is micro-markup the job of an SEO or a front-end developer?

Question

Search Engine Optimization

Good afternoon!
Express your opinion, is the introduction of micro-markup the work of a SEO or a front-end developer?)
I think SEO. Is not it so? Am I supposed to think it over and implement it myself?
p.s. i'm a developer

Answer 1

Well, as if it had been invented and described for a long time, the SEO specialist should say how it should be, the programmer should implement

Answer 2

Paint, indicate how everything should be - SEO. Implement (drive into code) - programmer.