Coding might help in on-page SEO but most SEO consultants ask the client's web developer to make changes in coding. All you have to do is suggest changes. The important factor these days is off-page SEO where coding doesn't play any role. Coding will certainly give you confidence though.
HTML Code & Search Engine Success Factors. HTML is the underlying code used to create web pages. Search engines can pick up ranking signals from specific HTML elements.
