Design Systems

Build Consistency, Scale Faster

Managing a growing product is challenging—without a unified design system, inconsistencies creep in, making future development inefficient and frustrating.

Underbelly helps you build robust, scalable design systems

Challenges we've helped solve

Inconsistent Interfaces

Without a unified system, design variations emerge, confusing users.

Inefficient Collaboration

Developers and designers struggle to stay aligned without clear standards.

Slow Feature Rollout

Repeated design efforts delay launches and increase costs.

Full-stack development

You're in good hands

With over 13 years of experience building digital products, we can help you build a scalable design system.

4.5
From 10+ google reviews

Testimonials

I can’t speak highly enough about the Underbelly team! Not only are they a blast to work with, but they helped us clarify and articulate complex business processes, engage our internal stakeholders and users, and put us on track to deliver great value back to the organization. They are highly responsive, maintain clear and consistent communication, and go above and beyond in their delivery. The work they have done will have a long-lasting impact on our organization. I wouldn’t hesitate to work with them again!
Seth McKnight
The Seed Company
It has been a pleasure working with Underbelly for 9+ months. The quality of product design work was excellent, and Underbelly integrated directly with our team, working with product and engineering to understand goals and requirements. Underbelly has felt like an extended part of our design team.
Chelsea Klukas
Facebook
"Working with Underbelly saved our team last year. We underwent a reorg, had to shift priorities, and focus on many new projects. Our core product would have been rendered stale had it not been for them. Although remote, you could barely tell, they worked with our team as if they were here. I’d definitely work with Underbelly again given the chance."
Stephanie Max
Facebook

Trusted by these

leading brands.

Test assumptions

Launch Your MVP with Confidence

We create design systems that are easy to use, scalable, and flexible enough to evolve with your product. Every component is developed with both design and development teams in mind—streamlining workflows and making future development faster and smoother.

User Research & Analysis
Design Audits
UX Research
Product Roadmap
User Personas
Discovery Sprints
Usability Testing
Wireframes & Prototypes
User Experience Design
User Interface Design
Interaction Design
Motion Graphics
Illustrations & Iconography
Digital Prototyping
UI Design & Development
Front-End Development
Back-End Development
Web Applications
Mobile Applications
SAAS Implementation
CMS Integration
How we work

Our approach to building Design Systems

We create design systems that are easy to use, scalable, and flexible enough to evolve with your product. Every component is developed with both design and development teams in mind—streamlining workflows and making future development faster and smoother.

Discovery & Audit
We assess your current product interfaces, identifying patterns, gaps, and opportunities for unification.
Component Library Design
We create reusable components for UI elements like buttons, forms, and modals, ensuring consistency across your product.
Documentation & Guidelines
We develop detailed design and development guidelines that align all stakeholders and provide clear usage instructions.
Integration & Handoff
We collaborate with your development team to integrate the system seamlessly into your workflow and tech stack.
Training & Ongoing Support
We provide training for your team and offer ongoing support to help the design system evolve alongside your product.
We create design systems that are easy to use, scalable, and flexible

Design system services

A design system isn’t just a collection of components—it’s the foundation of a cohesive product experience.

UI Component Libraries

Build a library of consistent, reusable UI components to speed up development.

Design Guidelines & Documentation

Ensure every designer and developer knows exactly how to use each component.

Design System Audits

Identify gaps and inconsistencies in existing systems and create a plan for unification.

Cross-Team Training

Help your design and development teams align around the new system with workshops and onboarding.

Ongoing Support & Iteration

Maintain and improve your design system as your product evolves.

Unblock Your Team

Give your team that extra capacity to release faster and beat your competitors to the market.

Let's talk

about your big idea.

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