Community Marketplace
Hyperlocal marketplace with geolocation, nearby store discovery, and order management.
Problem
Define the core challenge
Problem
Local businesses lacked a digital channel to connect with nearby customers, and buyers had no easy way to discover and order from neighborhood stores without relying on large, impersonal platforms.
Insight
Implementing accurate geolocation queries for nearby stores with reasonable performance; designing a flexible order state machine adaptable to different business types; securing multi-role access without over-complicating the permission model.
Target
Design a system that improves speed, usability, and delivery confidence without adding maintenance overhead.
Process
How the work was executed
Discover
A personal project for a community-focused marketplace where users discover nearby stores on a map, browse products, and place orders with full workflow tracking. Designed with scalability and security in mind from the ground up.
Build
Built a NestJS backend with TypeScript, Prisma, and PostgreSQL implementing geolocation-based store discovery, an order management system with workflow state transitions, secure JWT authentication, and a multi-role permission model.
Validate
Implementing accurate geolocation queries for nearby stores with reasonable performance; designing a flexible order state machine adaptable to different business types; securing multi-role access without over-complicating the permission model.
Solution
Translate constraints into a scalable solution
Process
A personal project for a community-focused marketplace where users discover nearby stores on a map, browse products, and place orders with full workflow tracking. Designed with scalability and security in mind from the ground up.
Solution
Built a NestJS backend with TypeScript, Prisma, and PostgreSQL implementing geolocation-based store discovery, an order management system with workflow state transitions, secure JWT authentication, and a multi-role permission model.
Architecture
NestJS modular backend with Prisma ORM, PostgreSQL for geospatial and transactional data, JWT-based auth with role separation (buyer, seller, admin), Docker containerization, and geolocation query support for nearby store discovery.
Results
Ship measurable outcomes
Results
Fully operational backend with geolocation discovery, order state workflows, and multi-role JWT auth — ready for frontend integration and user testing with a well-documented API surface.
Impact
Business and product teams gained better reliability, clearer UX behavior, and a stronger foundation for iteration.
Next
The system now supports future features with less rework and more predictable frontend execution.
Tech stack
- TypeScript
- NestJS
- Prisma
- PostgreSQL
- JWT
- Docker
- Node.js