freelancer for supabase postgres apps nextjs development company back end developer nextjs seo optimization mern stack developer web design full stack web developer freelancer for multi-language app support freelancer for biometric time tracking freelancer for ai powered web apps jotai state management seo expert for hire react hook form https://alexisibnoc.blogsidea.com/42855987/not-known-factual-statements-about-software-developer-kerja-apa