Ahmed Abu El-Hassan
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Case study 05 / 06Commerce, delivery & payments
Zabaih Sultan app icon

Zabaih Sultan

A commerce and delivery application with payment gateway integration, order fulfillment, maps, and GPS-dependent flows.

RoleFlutter engineer focused on delivery, payment, and location workflows.
Available on
  • Android
  • iOS
Live linksGoogle PlayApp Store

Product context

Checkout and delivery journeys need payment state, order state, and location state to remain coherent across the mobile experience.

Responsibilities

  • Integrated Mada and Apple Pay payment flows.
  • Implemented GPS tracking, Google Maps, and order-fulfillment experiences.
  • Connected mobile screens to REST APIs.

Technical challenges

  • Keeping checkout, payment, order, and location states consistent across a multi-step delivery flow.