Contact person: Business Client

Phone:Show

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Location: Kharagpur, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"My React Native app is already running on Expo; what’s missing is a rock-solid user flow and payments. I need you to add an email-and-password login screen, wire it to a secure database that stores each user’s full name, email address, phone number, and institute roll number, and then hook Razorpay into the app so users can pay through UPI.

Here’s how I picture the collaboration:

• Authentication: Build a clean, responsive sign-in/sign-up UI. On sign-up the credentials must be validated, hashed, and saved; on sign-in the session should persist across app restarts.

• Database: Spin up a lightweight backend (Firebase, Supabase, MongoDB Atlas, or similar—open to suggestions) with a single Users collection/table containing the four fields above. I want neat, commented code for create, read, and update operations plus a quick export of the schema.

• Payments: Integrate the Razorpay React Native SDK, restrict it to UPI payments for now, and return clear success / failure callbacks that I can track in the database.

Acceptance will be based on:
1. A clean Expo build that opens to the new login page and routes authenticated users to the existing screens.
2. Verified user records appearing in the database after sign-up.
3. A successful end-to-end UPI transaction in Razorpay’s test mode, followed by a live mode demo.

Ship the updated source code, brief setup notes, and any environment variables I need to add locally. Let’s make this as smooth as possible so I can push to production right after your hand-off." (client-provided description)