Implementation

BuyBox is a Nigerian e-commerce marketplace where vendors onboard stores, list products, and fulfill orders. I built the backend — owning the full API layer across store onboarding, product catalog management, cart and checkout, payment processing, delivery zone configuration, order lifecycle management, and real-time push notifications for both vendors and customers.

// Order lifecycle (high-level)
vendor onboards store → lists products with categories
  → buyer browses catalog → adds to cart
  → checkout → payment processed
  → delivery zone matched to order
  → order confirmed → fulfillment begins
  → real-time push notifications to buyer + vendor