freelancer for firebase firestore apps react streaming ssr react automatic batching nextjs seo optimization freelancer for multi-tenant saas apps web design react devtools ai assistant hire full stack developer react micro-frontends react component-driven development zustand react state library freelancer for openai integration python web development web design and development https://gregorypixld.diowebhost.com/91410248/top-top-web-developer-offering-price-secrets