full stack development react concurrent mode back end developer nextjs seo optimization react suspense data fetching react devtools ai assistant freelancer for multi-language app support responsive web design freelancer for headless ecommerce sites react component-driven development react recoil state management reactjs freelancer web development agency react query data fetching https://softwaredevelopers15-125235578.blogtov.com/16897717/the-best-side-of-software-developers-winnipeg