Multiuser App Suite Development
Budget: ₹100 – ₹400 INR
I need a full service built around three distinct yet interconnected applications, each with its own iOS and Android client but all sharing a common backend. The system must handle many simultaneous users without lag, so clean architecture, solid database design, and well-documented APIs are critical from day one.
Core build requirements
• One shared backend that exposes REST/GraphQL endpoints, manages data for all three apps, and scales easily.
• Mobile front-ends for iOS and Android for every app, designed for smooth navigation and fast load times.
• Secure authentication that lets users register or sign in with traditional email + password as well as their preferred social accounts.
• Integrated credit/debit card processing with tokenisation, charge, refund, and webhook handling fully wired into the backend.
• Real-time synchronisation between apps when records change, plus push notifications where appropriate.
• A lightweight web-based admin panel so I can review users, payments, and basic analytics.
Acceptance criteria
1. All three apps compile, install, and log in successfully on both iOS and Android simulators/devices.
2. A new user/account creation with email/password to allow signs in.
3. A stored card-on-file charge flows end-to-end in sandbox mode, returning a success receipt and updating the backend.
4. Source code is delivered in a single repository with a README that lets another developer spin up the stack locally in under 30 minutes.
5. Postman or similar collection documents every endpoint, and unit tests cover critical logic.
You are welcome to propose the tech stack—whether that is Flutter, React Native, Swift/Kotlin on the front, and Node, Django, or Go on the backend—as long as it meets the above goals and can be deployed to standard cloud services.
will give both high level design and lowlevel design along with UI/UX plans
If parts of the milestone plan seem unclear, flag them early; otherwise I’m ready to review architecture diagrams and get this moving.
Core build requirements
• One shared backend that exposes REST/GraphQL endpoints, manages data for all three apps, and scales easily.
• Mobile front-ends for iOS and Android for every app, designed for smooth navigation and fast load times.
• Secure authentication that lets users register or sign in with traditional email + password as well as their preferred social accounts.
• Integrated credit/debit card processing with tokenisation, charge, refund, and webhook handling fully wired into the backend.
• Real-time synchronisation between apps when records change, plus push notifications where appropriate.
• A lightweight web-based admin panel so I can review users, payments, and basic analytics.
Acceptance criteria
1. All three apps compile, install, and log in successfully on both iOS and Android simulators/devices.
2. A new user/account creation with email/password to allow signs in.
3. A stored card-on-file charge flows end-to-end in sandbox mode, returning a success receipt and updating the backend.
4. Source code is delivered in a single repository with a README that lets another developer spin up the stack locally in under 30 minutes.
5. Postman or similar collection documents every endpoint, and unit tests cover critical logic.
You are welcome to propose the tech stack—whether that is Flutter, React Native, Swift/Kotlin on the front, and Node, Django, or Go on the backend—as long as it meets the above goals and can be deployed to standard cloud services.
will give both high level design and lowlevel design along with UI/UX plans
If parts of the milestone plan seem unclear, flag them early; otherwise I’m ready to review architecture diagrams and get this moving.