Required English Grammar,Search Engine Optimization (SEO),SEO Backlinking freelancer for Updating and Improving our company website job

Need someone who can update our company website. We would like to be able to change graphics easily but more important- we need a section where we can post jobs and have those job postings easily populate to social media such as Twitter, Instagram, Facebook, Linkedin. - MUST be user-friendly so our team can change and update graphics such as videos, photos and those job postings easily and often.
Also, SEO optimization and other tools to help us be 'found' is important. No one on our staff is up to date on how this works so we need someone who really knows what they are doing to be able to guide us and set this up.

Skills & Expertise Required

English Grammar Search Engine Optimization (SEO) SEO Backlinking