freelancer for firebase firestore apps hire react developer freelancer for app refactoring and cleanup react automatic batching nextjs seo optimization website development web design full stack web developer responsive web design dotnet core development react component-driven development web development services web design services jotai state management freelancer for langchain https://software-developers-vs-so66840.designertoblog.com/67614093/new-step-by-step-map-for-software-developer-vs-web-developer