How can I use a digital product design firm to support interface design during a web platform rebuild?

A digital product design firm can be very useful during a web platform rebuild, especially for interface design. The key is to use them as a specialized design partner, not just as a “make it look nicer” vendor.

Here’s a practical way to do it:

1) Bring them in early

Involve the firm during discovery and planning, before development starts. They can help:

• review the current interface and pain points
• identify UX issues in the existing platform
• define design goals for the rebuild
• align the interface with business and user needs

Early involvement prevents the rebuild from becoming a direct copy of the old system.

2) Use them for UX/UI strategy

A strong digital product design firm should help with:

• user research
• journey mapping
• information architecture
• interaction design
• wireframes and prototypes
• visual design and design system creation

This helps ensure the new interface is not only attractive, but also easier to use and scale.

3) Ask for a design system

For a platform rebuild, a design system is often one of the highest-value deliverables. It gives you:

• reusable UI components
• consistent styling and behavior
• faster development
• easier future updates

This is especially important if your platform has many screens, user types, or responsive states.

4) Use prototypes to validate decisions

Before development, have the firm build interactive prototypes. These can be tested with real users or internal stakeholders to:

• validate workflows
• catch usability issues
• confirm that key tasks are intuitive
• reduce rework later

5) Work in close partnership with your developers

The firm should collaborate directly with your engineering team so designs are feasible and implementation-ready. Good practices include:

• shared design/dev reviews
• handoff specs and component documentation
• regular check-ins during development
• support for edge cases and responsive behavior

6) Use them to improve complex workflows

If your platform has complicated processes, permissions, dashboards, forms, or data-heavy screens, a design firm can be especially valuable. They can simplify these experiences and make them clearer for users.

7) Define their role clearly

Before starting, clarify what you want them to own. For example:

• full interface redesign
• UX research and testing
• design system creation
• conversion optimization
• accessibility review
• ongoing design support during implementation

This avoids confusion about responsibilities.

8) Measure success

Set goals so you can evaluate the impact of their work, such as:

• reduced task completion time
• fewer user errors
• higher conversion or activation rates
• lower support tickets
• improved usability scores

Best use cases for a design firm

A digital product design firm is especially useful if:

• your current interface is outdated or inconsistent
• the rebuild involves major UX changes
• you lack in-house product design expertise
• you need to move quickly without hiring a full design team
• the platform has multiple user roles or complex functionality

What to look for in a firm

Choose a firm that has:

• experience with web platforms, not just marketing sites
• a strong portfolio of product/UI work
• process maturity in research, prototyping, and handoff
• familiarity with accessibility and responsive design
• good collaboration with engineering teams

If you want, I can also help you with:

1. a scope of work for hiring a design firm,
2. a list of interview questions, or
3. a recommended workflow for design + development during a rebuild.