Full stack development

Web application development agency in Salt Lake City, UT

Our web app development agency specializes in building web and front-end applications using modern frameworks. Based in Salt Lake City, we serve innovative tech companies and startups nationwide.

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Your users expect fast, frictionless digital experiences.

Challenges we've helped solve

Slow Time-to-Market

Managing multiple development vendors adds complexity and delays.

Scalability Issues

Many systems struggle to grow with your business and user base.

Maintenance and Upgrades

Ongoing technical needs require cohesive and consistent code architecture.

Full-stack development

You're in good hands

With over 13 years of experience building digital products, we can help you build features quickly, so you can focus on the bigger picture.
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4.5

From 10+ google reviews

Testimonials

They caught on to our design routines very quickly and have been a standout designer throughout the entire engagement.

Joanna DeLong

Vivint

We initially selected Underbelly because, as a new company, we wanted a partner who was willing to start small with us. As we've grown, Underbelly has consistently met our needs and exceeded our expectations.

Brian Lovett

Trellis Rx

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

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leading brands.

Simple & engaging

Our Approach to Development

We specialize in building digital products that feel seamless to users and are easy to maintain and scale. Our team takes a holistic approach, handling everything from frontend design to backend infrastructure—ensuring the entire system works as one.

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

Elevate your user experience

We'll work with your team to uncover opportunities and build a roadmap to take your User Experience up a notch.

Planning & Architecture

We start by defining the right tech stack and system architecture based on your product’s needs.

Frontend Development

We create engaging and responsive user interfaces optimized for all devices.

Backend Development

We build reliable, secure backend systems that power your product and ensure smooth performance.

Database Management

We design and maintain scalable databases that grow with your business.

Testing & Deployment

We rigorously test for bugs and deploy with best practices to ensure stability from day one.

Lets work together

Benefits

Benefits of Hiring an Agency

With an experienced team member dedicated to you, you and your team are supported every step of the way.

Versatile Team Member

Our augmented team has experience across a multitude of problem areas, making them experts in learning quickly to tackle your specific needs.

Reduce Hiring Risk

By partnering with Underbelly, you have access to talent without having to hire and incur overhead expenses.

Flexible to Your Team Size

Whether you need a single designer of a full team, we scale to fit your needs.

100% Dedication to You

There is no priority overlap, your team member is dedicated to your team 100%.

Outside Perspective

Being in the weeds can limit your perspective. A fresh set of eyes can open new ideas.

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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