MrSeller

Overview

A multi-tenant SaaS platform for Saudi e-commerce sellers, currently a pre-launch MVP about 95% complete. It syncs orders and inventory across Amazon, Noon, Trendyol, and Salla, computes per-order profitability (platform fees, VAT, and currency effects), provides competitive price analytics, and runs Paddle subscription billing with trials and usage quotas. The backend is Django 6 with Django Ninja on PostgreSQL, Redis, and Celery; the frontend is Next.js 16 with React 19 and TypeScript, offering an Arabic-first RTL interface. The codebase is a modular monolith with a hexagonal (ports and adapters) design, JWT-based multi-tenancy, and a contract-first OpenAPI spec generating the TypeScript client — built solo while directing AI coding agents.

Key Outcomes

• Orders & inventory synced across 4 marketplaces
• Per-order profitability: fees, VAT & currency
• Paddle billing with trials and quotas
• Contract-first OpenAPI generating the TS client

Technologies