Nestar — Backend

A multi-role real estate platform backend for listing, browsing, and managing property rentals and sales.

Overview

Nestar is a NestJS + GraphQL backend powering a real estate listing platform. It serves three roles — Member, Agent, and Admin — through a single GraphQL API, letting members search and inquire about properties while agents manage their own listings and admins oversee the platform.

Key Features

Member

• Search and browse property listings (by type, location, price)
• View property details
• Like and follow properties / agents
• Write comments
• Receive notifications
• Community board (posts, categories)
• Profile management

Agent

• Create and update property listings
• Manage listing status (active / inactive / paused / sold / deleted)
• View property performance (views, likes)
• Respond to member inquiries

Admin

• Member management
• Agent management
• Property moderation
• Community post management
• Notification management

Tech Stack

Core: NestJS, TypeScript, GraphQL, Apollo Server, MongoDB, Mongoose

Auth & Security: JWT authentication, bcrypt

File handling: Multer (image uploads)

Data Model

A property listing includes: type, status (ACTIVE / INACTIVE / PAUSE / DELETE), location, address, title, price, and square footage, along with lifecycle timestamps for when it was sold, deleted, or constructed.

Database

members, properties, boardArticles, comments, likes, follows, views, notifications, notices, faqs, inquiries

API Architecture

• GraphQL as the primary API for all business logic (queries, mutations)
• Role-scoped resolvers and guards separating Member / Agent / Admin access

Architecture Patterns

• MVC (Mongoose schemas / NestJS controllers-resolvers / service layer)
• Dependency Injection (NestJS's built-in IoC container)
• Middleware (cross-cutting request handling)
• Guards (role- and auth-based route protection)
• Decorators (NestJS metadata-driven resolvers, guards, and DTOs)

Development Workflow

• Git
• GitHub
• master / develop branches

Project Highlights

• Multi-role SaaS architecture (Member / Agent / Admin) on a single schema
• GraphQL-first API design
• Listing lifecycle management (active, paused, sold, deleted) beyond simple CRUD
• Modular, decorator-driven NestJS architecture