nextjs development company react automatic batching freelancer for cross-browser testing freelancer for multi-tenant saas apps freelancer for admin dashboard ui freelancer for realtime dashboard web development services freelancer for ai powered web apps freelancer for langchain agent apps web design and development freelancer for ai assistant integration responsive web https://developerssoftware58113.mybjjblog.com/a-href-https-crystalcodes-org-projectpage-67596e891d6c6e6831c2bb13-secrets-51529724