Amazon Pack App

Redesigned Amazon's core warehouse packing application for the peak holiday season. The new GUI successfully eliminated a two-week training bottleneck, enabling contingent staff to onboard in minutes with negligible error rates during a live pilot at a major fulfillment center.

The Challenge

Amazon’s high-volume holiday demand requires scaling warehouse staff rapidly with seasonal workers. Previously, associates relied on a dense, text-heavy command-line interface to fulfill orders.

• The Problem: The legacy terminal required massive cognitive load, resulting in high error rates and a two-week training ramp-up period for new hires.

• The Goal: Transform a complex, function-over-form process into an intuitive graphical user interface (GUI) to dramatically lower onboarding costs and error rates before peak hiring began.

My Role

Working in a fast-paced environment with two-week sprint cadences, I partnered with a design manager, senior designer, copywriter, and developer. Midway through the project, the senior designer departed, and I stepped up to lead the design, validation, and launch execution.

• Contextual Inquiry & Field Testing: Conducted on-site user interviews and iterative usability testing at major fulfillment centers (including the Reno warehouse).

• Rapid Prototyping: Built high-fidelity interactive wireframes and workflow sequence flows to map out end-to-end associate actions.

• Cross-Functional Alignment: Collaborated directly with engineering to ensure technical feasibility, and handled typography, visual hierarchy, and UI system design details.

The Solution

CORE Design & UX

Visual Hierarchy for Scanning Behavior
Associates split their attention between the screen and physical plastic bins (totes). To reduce cognitive drift, I restructured the interface layouts to align with standard scanning patterns.

• Grouped similar data blocks logically and introduced explicit breadcrumbs to anchor the user's location in the fulfillment pipeline.

• Utilized color selectively as a functional tool rather than an aesthetic choice, matching on-screen UI highlights directly to the physical, color-coded box sizes located beneath packing tables.

Audio Cues for Muscle Memory
Experienced packers operate at high speeds, relying heavily on muscle memory rather than constant screen validation.

• Designed a system of distinct audio cues to signal task milestones (unique tones for initial tote scans, individual item verification, and final container completion).

• Conducted volume and frequency field testing to ensure the audio alerts successfully pierced through ambient warehouse machinery noise.

Results

The redesigned Pack App was piloted at the Indianapolis fulfillment center during the peak holiday season with outstanding operational success.

• Accelerated Onboarding: Enabled immediate, seamless onboarding for new hires, shifting training timelines from two weeks down to a matter of minutes.

• Zero-Context Usability: During validation, un-trained employees from completely different warehouse departments were able to step in and successfully pack orders flawlessly, guided entirely by the intuitive UI.

• Product Scaling: Following the successful pilot, leadership greenlit our team to expand this design system across two additional fulfillment pipelines, including adaptive versions for mobile scanners and wearable devices.