react developer hire react developer front end developer web design company jotai state management freelancer for openai integration freelancer for langchain agent apps react lazy loading components react virtualized rendering freelancer for render.com deployment freelancer for cpanel app deployment hire software developer database integration freelancer for school website development https://stern-elvis-pinball-machi48036.bloggactivo.com/35585917/the-best-side-of-software-developer-kpi-template