004 · E-Commerce
EasyShop
Multi-Vendor E-Commerce
Completed
2022
Tech
004
Year
2022
Duration
9 months
Team Size
5 engineers
Role
Tech Lead
High-throughput multi-vendor marketplace with dynamic pricing
Overview
EasyShop is a horizontally scalable multi-vendor marketplace that allows multiple sellers to manage their own storefronts under a single platform. It features dynamic pricing rules, real-time inventory sync, and integrates with Stripe for secure payments.
Key Achievements
Multi-vendor storefront with isolated inventory and order management per seller
Dynamic pricing engine supporting time-based and volume discounts
Stripe Connect integration for automatic vendor payouts
Real-time inventory sync preventing overselling
Technical Challenges
01Inventory overselling
Concurrent purchases depleted stock below zero during flash sales.
Solution →Used Postgres row-level locking with a decrement-and-check pattern ensuring stock never goes negative.
02Vendor payout complexity
Splitting payments between platform and multiple vendors per order was error-prone.
Solution →Leveraged Stripe Connect's transfer API with a ledger table tracking every split, making reconciliation straightforward.
metrics.json
50+
Vendors
10K+
Products
500+
Orders/Day
99.9%
Uptime
Technology
Frontend
Next.jsReactTypeScript
Backend
Node.jsExpressTypeScript
Database
PostgreSQL
Payments
Stripe
Development Timeline
Phase 01 · Architecture
Multi-vendor modelDB designPayment flow