POS (Point of Sale) System This is a production-ready Point of Sale web application designed for retail operations, fully containerized with Docker. It's a modern full-stack system combining a Next.js frontend with a FastAPI backend, PostgreSQL database, and complete business logic for managing sales, inventory, customers, and reporting.

Key Capabilities

Authentication & Access Control — JWT-based auth with role-based permissions (Admin, Manager, Cashier)

Core POS Functions — Fast checkout with product grid, cart management, and multiple payment methods

Business Operations — Product/inventory management, customer tracking with loyalty points, sales & refunds, receipts

Analytics — Dashboard with KPIs, sales trends, product performance, inventory status

Admin Tools — User management, store settings, audit logging, stock movement tracking

Skills Required

CategorySkillsFrontendReact/Next.js 14, TypeScript, Tailwind CSS, component libraries (shadcn/ui), state management (Zustand), async data fetching (TanStack Query)BackendPython, FastAPI, async database patterns, SQLAlchemy ORM, API design (REST/v1)DatabasePostgreSQL, SQL, schema design, database migrations (Alembic)DevOpsDocker, Docker Compose, container orchestration, environment configurationSecurityJWT authentication, refresh token flows, role-based access control (RBAC)

Tools & Technologies

LayerToolsFrontendNext.js 14, TypeScript, Tailwind CSS, shadcn/ui, TanStack Query, ZustandBackendFastAPI, Python 3.12, SQLAlchemy 2.0 (async), Pydantic v2, AlembicDatabasePostgreSQL 16InfrastructureDocker, Docker ComposeArchitectureMonorepo (backend/ + frontend/), RESTful API, JWT-based auth

The project emphasizes simplicity and production-readiness — no Redis/background workers, direct API calls from browser (CORS-enabled), and idempotent startup migrations for reliability. https://ai-point-of-sale-software.vercel.app/