Designing for the Builder: Redesigning an Internal Developer Tool

Role: Solo UX Designer
Team: 7 people across design, product, and engineering
Timeline: 6 weeks
Highlighted Tools: Figma, usability testing, WCAG accessibility standards

Eno Web Assistant is a Capital One browser extension that uses virtual card numbers to make online shopping more secure. Behind it is the KitchenAid Extension, a developer-facing tool used to create and maintain the rules that make Eno work across thousands of merchant checkout pages.

Testing revealed that the existing extension was error-prone and unintuitive for anyone who hadn't already spent months learning it.

I redesigned the extension from low-fidelity sketches through a fully tested high-fidelity prototype, running usability tests at each fidelity level to validate improvements before moving forward. By restructuring the information architecture and updating the visual hierarchy, task completion climbed from 51% to 83% at mid-fidelity, and 94% at high-fidelity.

Having started my career as a developer at Capital One, I understood the tool from both sides, which meant I could design for the technical constraints without losing sight of the user.