Dividely — Expense-Sharing & Group Settlement Backend

Built the core backend for Dividely, an expense-sharing platform that helps groups track shared expenses and automatically settle balances.

Key contributions:

Designed the data model and logic for tracking shared group expenses and individual participant balances

Built an auto-settlement algorithm to calculate the minimal set of payments needed to balance a group

Structured the backend with NestJS's modular architecture for maintainability and clean separation of concerns