react streaming ssr back end developer react compiler optimization mern stack developer hire full stack developer dotnet core development web development services freelancer for ai powered web apps nextjs app development freelancer for whisper api transcription freelancer for ai assistant integration freelancer for app deployment and hosting angular development https://avengers-pinball-machine05712.fitnell.com/77163783/not-known-factual-statements-about-software-developer-kerja-apa