freelancer for app refactoring and cleanup nextjs seo optimization react signals state management react suspense data fetching react devtools ai assistant website design custom web application development zustand react state library jotai state management seo expert for hire freelancer for whisper api transcription react transitions animations angular development website https://cheapestwebdeveloper90010.empirewiki.com/9065396/5_simple_techniques_for_web_developer_job_growth