Build “Mera Box Light” – Cloud Storage App + Backend (Node.js + Flutter)I want to build a mini cloud storage system similar to a light version of TeraBox.Project name: Mera Box LightGoal: Users can back up their files (photos, videos, documents) to the cloud, access them from anywhere, upgrade storage via subscription plans, and free users will see ads.I need ONE developer/team who can build BOTH:Backend (API + database + storage logic)Mobile App (Android first; Flutter preferred)Tech stack Backend:Node.js + ExpressPostgreSQLJWT authREST API (JSON)Deploy on my VPS (UAE/Dubai region)Mobile App:Flutter (preferred) OR React NativeAndroid (Phase 1, ready for iOS later)Integrations:My REST APIsGoogle Play Billing (subscriptions)AdMob (ads)Plans & storage (with example prices – can change later)FREE: 5 GB storage, ads ON, ₹0 / monthLITE: 50 GB storage, fewer or no ads, around ₹199 / monthPLUS: 200 GB storage, no ads, around ₹399 / monthPRO (future): 1 TB storage, no ads, around ₹799 / monthUser data should include: planType, planExpiresAt, maxStorageBytes, usedStorageBytes.Backend features (short)Auth: register, login, /me (JWT)File system:Upload file with storage limit per planList my files (pagination)Download (owner only)Soft delete (trash)Share link with public token URLTrack usedStorageBytes per user and block upload when limit reachedBilling endpoint to upgrade plan after Play Store purchase (update planType and maxStorageBytes)JSON responses: { success: true/false, data/message }Mobile app features (short)Screens:OnboardingSign Up / LoginHome (used/total space, plan name, upload, my files, upgrade)My Files (list)File Detail (download, share, delete)Plans screen (FREE, LITE, PLUS, PRO with Google Play Billing)Settings (profile, storage info, rate app, privacy policy, logout)Ads logic (AdMob):FREE: banner + limited interstitialLITE: fewer/optional adsPLUS/PRO: no ads App should read planType from backend and show/hide ads.Ownership & confidentiality This is a work-for-hire project. All source code, designs, APIs, and related work will belong to me after full payment. You may NOT reuse or rebrand this app for yourself or other clients. Project details are confidential.What I expectBackend on my VPS + working Android appClean, documented code (backend + app)API documentation (Postman/Swagger)Help to deploy on my accounts (VPS, Play Console, AdMob, Firebase if needed)Your fixed price and timeline for:Option A: Backend onlyOption B: Backend + AppWhen you apply, please send:Links to 2–3 similar apps you built (cloud/storage/subscription)Tech stack you will use and approx timeline (weeks)Your fixed price quote for Option A and Option B.