advanced seo (structured data, hreflang, schema & all code optimizations for seo)

am working on a new website & i want to optimize the code for seo (having clear structured data, schema, hreflagn (or any alternative to rank on different locations/ other alternatives to geo or language target/ international seo) i welcome consults on other code work issues that will affect seo, other factors like if host etc

i am not interested in contect writing, link building or any on page seo (whitehat or blackhat not interested in these) so please dont spam my request