freelancer for firebase firestore apps full stack development freelancer for app refactoring and cleanup nextjs developer for hire react compiler optimization react suspense data fetching web programming hire full stack developer dotnet developer dotnet mvc developer web development services freelancer for langchain agent apps react development responsive web design https://software-developers-onet73961.blogolize.com/5-easy-facts-about-web-developer-portfolio-github-described-75396937