react concurrent mode nextjs seo optimization react suspense data fetching full stack web developer hire full stack developer react edge computing react component-driven development custom web application development reactjs freelancer freelancer for openai integration freelancer for langchain agent apps react 18 features freelancer for heroku apps maintenance react ecommerce https://martinplgav.oblogation.com/35442814/5-tips-about-software-developer-banner-for-linkedin-you-can-use-today