Some marketing skills are essential for full-stack programmers working in freelancer marketplaces, but not those who have specialized in one particular field.
A reason for hiring full-stack developers is cost cutting, so one can manage the entire job including design and development. Marketing is an integral part of launching a website. Without marketing a website remains invisible to search engines. A website should be designed and built with SEO (search engine optimization) in mind. The better your website structure, the better your chance of ranking higher in the search engines. A developer who contributes to the SEO efforts is certainly more useful.
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