PaisaSplit

Context & problem

PaisaSplit is an expense-sharing app for Indian friend groups, families and trips. People track shared costs, split bills in different ways, and settle up over UPI.

My responsibilities

• Built groups with five types — Family, Friends, Couple, Trip and Office — including group photos and a balance limit.
• Added three ways to join a group: QR code, deep link and email invite.
• Built on-device receipt scanning with Google ML Kit OCR that splits a bill item by item.
• Built settling up through UPI and PayPal payment links.
• Added monthly budgets and per-person net balances across all groups.

Implementation & technical decisions

• Flutter (Dart) with Provider for state management.
• Node.js and Express API with MongoDB (Mongoose).
• Sign-in with JWT and Google OAuth.
• Receipt OCR runs on the device with Google ML Kit.
• Push notifications through Firebase Cloud Messaging, and email through Nodemailer.