nextjs development company freelancer for responsive landing pages freelancer for cross-browser testing react suspense data fetching freelancer for multi-language app support react edge computing web development company freelancer for biometric time tracking zustand react state library freelancer for machine learning integration react query data fetching freelancer for langchain agent https://mylesqpgvj.bcbloggers.com/35490204/new-step-by-step-map-for-software-developer-vs-web-developer