freelancer for supabase postgres apps react automatic batching fullstack dev mern stack developer hire full stack developer dotnet developer freelancer for realtime dashboard freelancer for biometric time tracking seo expert for hire node.js development freelancer for ai assistant integration freelancer for heroku apps maintenance nextjs ecommerce development react native https://alexisjqstu.topbloghub.com/42695005/new-step-by-step-map-for-software-developer-vs-web-developer