I'm confused as to what is meant by "low-level coder" here. Is it programmers who work with C or assembly and maybe on embedded systems or programmers who lack

I'm confused as to what is meant by "low-level coder" here. Is it programmers who work with C or assembly and maybe on embedded systems or programmers who lack much ability? (My intuition and a google search suggests the former, although many comments and the contrast with 'rockstar' (unless that refers to another programming domain :)) suggests the latter. Edit: It is especially weird when the post then refers to people with an engineering background, since those people are more likely to be working on low-level embedded coding.