nextjs development company react signals state management freelancer for admin dashboard ui web programming website design custom web application development freelancer for ai powered web apps freelancer for machine learning integration python web development freelancer for ai assistant integration responsive web design react lazy loading components freelancer for render.com https://softwaredevelopersdescrip51735.fitnell.com/77205331/new-step-by-step-map-for-software-developer-vs-web-developer