DoorDash UX/UI Designer Interview Questions

In regions with unreliable internet connectivity, it is crucial for DoorDash to provide a consistent tracking experience for customers awaiting their deliveries. This challenge focuses on optimizing the mobile experience under such constraints.
Problem Statement: Redesign the delivery tracking interface to ensure users can effectively follow their delivery progress even with slow or intermittent internet connections.Example 1:
Input: Current delivery tracking interface
Output: Reimagined mobile wireframes optimized for low-bandwidth environments.
Explanation: Show how the new design maintains essential functionality while reducing data load.Constraints:
- The interface must not require more than 1MB of data to load fully.
- All key tracking data must be presented in a concise format.
- Implement a progressive enhancement strategy for high-speed connections.

In order to improve the user experience for customers with disabilities, DoorDash aims to enhance its checkout flow for better usability. This redesign should focus on making the process more accessible according to WCAG 2.1 guidelines.
Problem Statement: Redesign the checkout flow to create a seamless, accessible experience for all users. Consider elements such as screen reader compatibility, keyboard navigation, and contrast ratios for readability.Example 1:
Input: Current checkout flow
Output: Redesigned wireframes and user flows demonstrating improved accessibility
Explanation: Highlight how the new design addresses specific accessibility challenges and integrates feedback from user testing.Constraints:
- Ensure compliance with WCAG 2.1 criteria.
- Redesign must not extend the checkout process beyond 5 steps.
- A/B testing will be used to measure user performance metrics.

The DoorDash app's visual elements must align with the brand identity to foster user trust and recognition. A thorough evaluation of the design system will identify areas for improvement.
Problem Statement: Review the design system used in the DoorDash app to ensure visual consistency across all application interfaces.Example 1:
Input: Current design system documentation
Output: A report highlighting inconsistencies and proposed updates to color schemes, typography, and iconography.
Explanation: The findings should detail how inconsistencies impact user perception and brand identity.Constraints:
- All proposed updates must adhere to the existing branding guidelines.
- Analysis must cover both mobile and web interfaces.

The restaurant selection feature on the DoorDash app has become a pain point for many users, leading to frustration during the ordering process. Analyzing and redesigning this flow could enhance the user experience significantly.
Problem Statement: Critique the restaurant selection process to identify friction points and propose actionable improvements based on user experience principles.Example 1:
Input: Current restaurant selection flow
Output: List of identified pain points with annotated screenshots and proposed design adjustments.
Explanation: Present an analysis of key issues affecting user satisfaction and navigation speed.Constraints:
- Must identify at least 5 major pain points with supporting data.
- Recommendations must cater to both desktop and mobile users.

DoorDash is experiencing difficulty in retaining users on the app due to a confusing navigation structure. A well-defined information architecture can significantly improve user experience and engagement levels.
Problem Statement: Revamp the navigation structure of the DoorDash app to enhance accessibility to essential features and information, reducing friction for users.Example 1:
Input: Current navigation design
Output: New proposed IA diagrams and user journey maps.
Explanation: Show how the new structure categorizes features intuitively for users.Constraints:
- All navigation links must be accessible within 2 taps from the home screen.
- Ensure clarity in labeling and a consistent approach to user paths throughout the app.