Project Overview
Rex Neobank provides a modern banking experience for SMEs, including a POS solution that allows merchants to accept card, NFC, and QR payments seamlessly. I was tasked with designing an interface that merchants could learn in minutes and use confidently in fast-paced retail environments.
My Role
Product: Rex Neobank POS Interface
Role: Lead Product Designer
Timeline: 4 weeks
Team: 1 Product Manager, 2 Engineers
Tools: Figma, FigJam
Context & Problem or Challenge
Merchants often found existing POS machines slow, cluttered, and hard to use, resulting in lost sales during peak hours.
Pain Points Identified:
Overcomplicated menus for simple transactions.
Small buttons leading to frequent errors.
Payment confirmation wasn’t clear, causing double charges.
Reports were difficult to access and understand.
Our Goals
Simplify transaction flow — reduce steps for payments.
Design for quick glance readability with high-contrast UI.
Ensure universal usability for merchants with varying tech literacy.
Integrate multiple payment methods (Card & NFC).
Improve transaction reporting for end-of-day settlements.
Research & Insights
User Research:
Interviews with small business owners and cashiers.
Findings:
Speed and clarity were more important than aesthetics.
Merchants wanted “Enter Amount → Tap → Done” simplicity.
Offline capability was essential due to unreliable connectivity.
Competitive Analysis:
I found that most existing POS systems bury reports and payment confirmations behind multiple menus.
My Design Process for this
Information Architecture: Focused on a simple, 3-step flow for payments.
Wireframes: Explored multiple layouts with large, thumb-friendly buttons were most successful.
Iterations: Added a “Quick Sale” feature with preset amounts for high-frequency payments.
Feedback Loops: Conducted usability tests with 5 merchants; 80% completed transactions without training.
Information Architecture: Focused on a simple, 3-step flow for payments.
Wireframes: Explored multiple keypad layouts; large, thumb-friendly buttons were most successful.
Final Design: Key Screens
Home Screen: Large numeric keypad, preset amounts, “Sale” button front and center.
Payment Method Selection: Card, NFC — visually distinct, with quick-tap design.
Transaction Confirmation: Clear green checkmark + sound/vibration feedback.
Reports Screen: Daily summary, transactions, and settlements easily accessible.
Design Principles:
High-contrast theme for readability under various lighting conditions.
Optimized for touch interactions, reducing mis-taps.
Seamless experience — transaction flow reduced from 5 steps to 3.
Impact
Transaction times reduced by ~45% in internal testing.
Error rates dropped, thanks to clearer button hierarchy and confirmation screens.
Positive merchant feedback: “I can finally train my staff in under 5 minutes.”
Reflection
Designing for POS machines emphasized speed, simplicity, and context awareness. If revisiting the project, I’d explore offline-first reporting and multi-language support for wider adoption.
Next Step
Would you like me to create a one-page visual case study layout where:
UI screens are integrated into the story (with callouts),
The “3-tap flow” is visualized,
And the outcome metrics are shown?