Project Overview I am looking for an experienced developer or development team who can work on an existing system consisting of: Android Partner App (Java) Backend APIs (.NET Core / C#) Admin CMS (Angular) Customer Mobile App (minor UI updates) Work includes bug fixes, improvements, and adding several new modules. Tasks will be assigned module-wise and priority-wise. Complete Requirements A. Android Partner App (Java) Partner onboarding (Name, Aadhaar, City, Photo, Number) Fix photo upload crash (compression + stability) Single-device login system Auto-logout when logged in on a new device OTP-based device activation Auto logout after 24 hours Invoice upload & view feature GST / UDYAM logic integration Notification module with backend attachment support Doorstep report feature (mandatory before status update) Laptop & iMac special flow (lead only, no pricing) UPI recharge using intent (GPay / PhonePe / Paytm) Payment gateway webhook testing Call masking integration Backend Development (.NET Core / C#) Partner onboarding APIs Photo/Aadhaar upload APIs (with compression) Session control APIs (single login + auto logout) Invoice generation & retrieval GST / UDYAM backend logic Notification and attachment APIs Doorstep report APIs Special product category flow (Laptop/iMac – lead only) UPI recharge integration Payment gateway LIVE webhook verification Role-based access APIs (Admin / Manager / Finance / Super Admin) Wallet logic (used, blocked, recharge, adjustments) CMS Admin Panel (Angular) Dashboard improvements (credits used, blocked, recharged, adjustments) Today’s wallet stats (usage, recharge, low balance list) Partner table module Ledger module with export Filter system (date range, partner name/ID) Minor UI/UX fixes Customer App Small UI updates Minor bug fixes Testing & Deployment Full QA (Android, CMS, Backend) Debugging & stabilization Payment gateway LIVE testing API deployment support App release build support Deliverables Updated Android App (APK + source code) Updated Backend (.NET Core) source code Updated Angular CMS source code Payment/Webhook integrated & tested Documentation for added modules Developer Requirements Experience with Android (Java), .NET Core, Angular Must follow clean code practices Must provide regular updates Must work module-wise with milestone delivery Ability to start immediately Additional Notes Full source code will be provided after confirming the project. AWS environment already configured.