react concurrent mode back end developer freelancer for multi-tenant saas apps react suspense data fetching web programming website design dotnet developer web development company freelancer for realtime dashboard custom web application development zustand react state library freelancer for machine learning integration react query data fetching freelancer for langchain agent https://avengerspinballmachine57899.fare-blog.com/36595590/the-2-minute-rule-for-software-developers-working