Jou Sun

Traceable food, directly from the source. An end-to-end online grocery platform connecting local farms and wet markets to households.

Role Co-founder / CTO / Full-stack Developer
Domain Food / Supply Chain / E-commerce
Focus End-to-end product execution, logistics logic, B2B tooling
Website jousun.com
Jou Sun e-commerce storefront showing fresh produce categories and featured products
The customer-facing storefront designed for quick reordering and product discovery

The Problem

Market Gap

Hong Kong's "wet markets" offer the freshest produce but operate during hours inconvenient for working professionals. The best quality food remained inaccessible to those who needed it most.

Supply Chain Complexity

Existing solutions lacked transparency. There was no centralized way to aggregate produce from fragmented local farms and markets while guaranteeing freshness and traceability.

User Friction

Suppliers and logistics partners had varying levels of technical literacy, making complex digital tools a barrier to adoption rather than an enabler.

Visual representation of Hong Kong wet market challenges and supply chain fragmentation
The founding team of Jou Sun in Wan Chai (Hinz, Jessica and Chris)

Constraints & Considerations

  • Perishability — The system had to handle three temperature zones (ambient, chilled, frozen) with strict time windows to minimize spoilage.
  • Operational Speed — Inbound and outbound sorting needed to happen rapidly in limited warehouse space.
  • Technical Adoption — Tools for suppliers and delivery staff needed to be usable by non-technical workers in fast-paced, physical environments.

Approach & Execution

Built a unified platform covering the entire lifecycle—from farmer harvest to customer doorstep. Each touchpoint was designed with its specific user in mind.

Customer Experience

Developed a fast, intuitive storefront UI designed for quick reordering and clarity. Customers could trace the origin of their produce and trust the freshness guarantees.

Supplier Integration

Created mobile and desktop apps allowing suppliers to print unique itemized barcodes and manage packing data directly. Simplified interfaces for users of all technical comfort levels.

Warehouse Logistics

Built a mobile app for warehouse staff to manage sorting and inventory, enabling flexible use of space rather than rigid racking systems.

Last-Mile Delivery

Provided delivery partners with a mobile app for real-time routing and barcode scanning to ensure order accuracy at every handoff point.

Outcome & Impact

Market Leadership

Over two years, amassed the largest assortment of local farm produce in Hong Kong, becoming the go-to platform for traceable, fresh groceries.

Operational Efficiency

Successfully digitized the "wet market" supply chain, reducing error rates in packing and delivery while maintaining freshness guarantees.

User Adaptability

Proved that complex B2B systems can be adopted by users of varying ages and technical comfort levels if the UX is adapted to their workflow.

Visual representation of Jou Sun's impact and market leadership in Hong Kong's local produce market
The platform hosted the largest assortment of local farm produce in Hong Kong
Dashboard showing order management, inventory levels, and operational metrics
Operations dashboard providing visibility across the entire supply chain
Key Takeaway

In B2B systems, especially within operational contexts, technology must adapt to the users—farmers, drivers, packers—rather than expecting users to adapt to complex software.

Skills & Tools

Full-Stack Development Supply Chain Logic Mobile App Development Barcode/Inventory Systems UX/UI Design for Operations B2B Platform Architecture Real-time Logistics