Case Study · Production

Merchant Payments

Improving usability and consistency in a production payment application amid evolving business priorities and technical constraints.

Role
UX/UI Designer
Project
Production Product
Focus
Consistency • Product Evolution • Merchant Experience
Availability
Live
Merchant Payments — production payment journey across Enter amount, Present card, Enter PIN, Connecting, and Success & receipt screens

01

Overview

A production payment application used by merchants in everyday transactions.

The work sat inside an established product: new features, interface updates and visual changes had to fit the existing architecture.

The goal was incremental improvement — usability, consistency and maintainability — not a full redesign.

02

My Role

UX/UI design for new features and interface improvements.

I worked with stakeholders, the Project Manager and engineering to turn business requirements into solutions that could ship and stay consistent with the product over time.

03

Challenge

Years of product growth had left inconsistencies in components, interaction patterns and visual language.

A branding transition ran in parallel, so visual exploration had to stay flexible as priorities shifted.

Improvements needed to respect the existing architecture while leaving room for later change.

04

Process

Work started with shared discussions on product goals and visual direction.

Concepts explored a proposed branding update and stronger consistency across the application.

When the branding strategy changed mid-development, design shifted to reinforcing the current visual language instead of replacing it.

In parallel, feature and usability work continued with engineering and stakeholders as requirements changed.

Decisions weighed implementation effort, consistency and maintainability alongside usability.

05

Production Walkthrough

06

Outcome

Interface and feature improvements shipped into the production application, with a more consistent merchant experience.

When branding direction changed, the process showed the value of adapting design without abandoning product consistency.

07

Reflection

Product design is rarely linear.

Priorities, branding and technical limits can shift mid-project.

Useful design adapts to those shifts while keeping usability and product direction clear.

The work also sharpened how I argue for decisions that hold up for users, engineering and the business.