Group Buying Marketplace - Community Deal Platform Where the Price Falls as More People Join

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A group-buying marketplace where neighbours and teams pool orders so the price drops for everyone who joined, and nobody pays unless the group hits its target.

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What's included

Source Code
README
Setup Guide
Docker Compose
Demo Data

FastAPIPythonPostgreSQLSQLAlchemyJWTServer-Sent EventsJavaScriptDocker

Project notes

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Buyers pledge to deals with a price ladder, vendors publish deals and get an order sheet with sizes totalled, and an admin dashboard verifies vendors such as pharmacies that need a drug licence. It is built with FastAPI, PostgreSQL 16, SQLAlchemy 2, JWT auth, Server-Sent Events for live updates, a vanilla JavaScript front end and Docker Compose. Students learn tiered-pricing logic, real-time updates without WebSockets, role-based APIs with automatic Swagger docs, and pytest testing for a FastAPI service.

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