Need fast, secure, scalable backend APIs? I’ll build custom NodeJS + Express + MongoDB + Firebase APIs with clean architecture, robust security, and ready for growth. 💡 Includes: REST APIs, database integration, authentication, middleware, third-party APIs, and full documentation. ✅ Pro developer, clean code, friendly communication. Perfect for startups & SaaS apps. Let’s build a backend your users can rely on! Fiverr gig: https://www.fiverr.com/s/rEko8BP #NodeJS #ExpressJS #MongoDB #Firebase #BackendDevelopment #APIDevelopment