freelancer for firebase firestore apps react concurrent mode back end developer react compiler optimization website development freelancer for admin dashboard ui freelancer for design to code website design freelancer for pixel perfect development react micro-frontends react component-driven development freelancer for biometric time tracking zustand react state library nextjs app https://are-game-developers-softw77912.loginblogin.com/44073939/not-known-factual-statements-about-software-developer-kerja-apa