freelancer for supabase postgres apps react concurrent mode back end developer mern stack developer web design website design responsive web design web development company react component-driven development react recoil state management freelancer for openai integration react 18 features modern web design react transitions animations angular development react memoization optimization https://edwinjzodm.wikiadvocate.com/6987829/indicators_on_top_web_developer_offering_great_quality_you_should_know