react developer react concurrent mode back end developer nextjs seo optimization freelancer for admin dashboard ui react devtools ai assistant website design web design company web development services freelancer for ai powered web apps jotai state management freelancer for ai assistant integration responsive web design freelancer for netlify functions https://elliotmjgav.blogvivi.com/37033592/how-software-developer-key-skills-can-save-you-time-stress-and-money