A Point of Sale (POS) system sits at the center of daily business operations—where speed, accuracy, and reliability directly impact revenue.
In this project, I led the redesign and architectural overhaul of our POS platform, evolving it from a bespoke system built for a single beverage brand (大苑子 DaYung’s) into a scalable, multi-merchant SaaS solution. The goal was to support diverse retail and F&B workflows while maintaining operational efficiency and system clarity.
Lead Product Designer
In Development (Estimated Launch Q2 2026)
The primary challenge was not simply adding new features—it was reconciling fundamentally different business models within a single system.
For example:
Without careful design, the system risked becoming:
Through user feedback and competitive analysis, I identified a critical bottleneck: as product configurations increase, pricing logic becomes exponentially more complex.
Store operators often had to:
This led to:
Before moving into interface design, I mapped the underlying pricing logic to ensure the system could support complex relationships across attributes, channels, and modifiers.
Instead of allowing unrestricted customization, I focused on building a system that:
I introduced a modular system that separates:
This structure allows:
The system dynamically adapts based on business needs while keeping data organized and manageable.
To address pricing complexity, I introduced a dendrogram-based interface that visualizes pricing relationships as a hierarchical structure.
This transforms pricing from:
Key benefits:
Users can define pricing using:
The system automatically calculates final prices across all combinations, ensuring consistency across:
This eliminates the need for manual calculations and significantly reduces error risk.
To prevent costly mistakes, I designed a mandatory validation system:
This ensures:
The final interface translates complex pricing logic into a structured and manageable workflow, allowing users to configure products efficiently without sacrificing clarity.
Instead of manually calculating each variation, they:
Within minutes, a previously complex setup becomes:
Given the complexity of the system, close collaboration with engineering was critical. I worked with developers to validate:
The redesigned system improves product configuration by:
This enables merchants to:
This project reinforced that scalability is not about adding more flexibility—it’s about defining the right constraints. By structuring the system around modular logic instead of custom exceptions, we were able to support diverse business needs while maintaining clarity and usability.
Following launch, the focus will shift to validating real-world performance: