Languages and tools depends on your context

Search Engine Optimization

• Organic search
• Integration and administration for WordPress” s plugins as Yoast, All In Seo, schema, Rich Snippet, Site Kit …
• Conception and Development for WordPress’s plug-in
• Integration and administration for Api and Google SDK : Google Analytics, Google AddWords, Page Speed InSight, Google Search …
• Traking software (Google analytic, Yooda, Yoast, Agentwebranking, seo Powersuite …
• Write technical’s articles

Languages

• Content Management System: WordPress, Prestashop, Joomla
• Internet languages: tools and api Google, HTML, CSS, javascript, node.js, jquery, php, java, xml, Smarty. python…
• Database : sql, mysql ….