Top JavaScript Companies in Colorado for 2025

Colorado has emerged as a hub for tech innovation, with numerous companies specializing in JavaScript development. Whether you’re looking for a partner to develop a complex web application or build an intuitive mobile app, the state boasts a variety of companies renowned for their expertise in JavaScript frameworks like React, Angular, and Node.js. 

This article explores the top JavaScript companies in Colorado, providing insights into their services, specialties, and what sets them apart.

Key Takeaways:

• Top Choices: Colorado is home to several highly-regarded JavaScript development companies, each with unique strengths and specialties.
• Diverse Expertise: Companies in this region offer a wide range of services, from frontend and backend development to UX/UI design and digital transformation.
• Focus on Innovation: Many of these companies employ cutting-edge JavaScript technologies, ensuring robust, scalable, and efficient solutions.

Top JavaScript Companies in Colorado

1. Flatirons 
2. MojoTech
3. Exadel
4. Human Design
5. Infinum
6. Gorilla Logic
7. Kin + Carta
8. Cuttlesoft
9. Thoughtbot
10. Deventry

Flatirons

Flatirons specializes in building dynamic and robust JavaScript applications that cater to various business needs. With a strong focus on mobile app development, Flatirons leverages JavaScript technologies like React Native and Node.js to create cross-platform applications that run seamlessly on both iOS and Android devices. Their team of skilled developers also offers comprehensive backend API development, ensuring secure and efficient data management for any project. 

Notable clients include Jombine, Osmosis, and Tattle, showcasing their ability to deliver high-quality solutions across multiple industries. Flatirons is also known for its emphasis on user experience, with a dedicated UI/UX design team that enhances app usability and engagement.

MojoTech

MojoTech is a full-service software development agency based in Boulder that excels in creating scalable web and mobile applications. Their team has extensive experience in crafting custom digital products that help businesses grow and adapt to evolving market demands. 

MojoTech’s portfolio includes high-profile clients like Blue Cross Blue Shield and Credit Karma, indicating their capacity to handle complex projects with ease. They also offer digital transformation services, guiding companies through the intricacies of adopting new technologies and processes.

Exadel

Exadel is a global software engineering company with a presence in Boulder, offering a comprehensive range of digital solutions. While they are proficient in JavaScript frameworks like React, Angular, and Vue.js, Exadel’s expertise extends beyond these technologies to include digital transformation, platform modernization, UX/UI design, and backend development. 

Their portfolio features diverse projects, such as enhancing website performance for Amarr and modernizing platforms for Kalibrate, demonstrating their ability to cater to a variety of client needs across different sectors.

Human Design

Human Design, located in Boulder, combines creativity with technology to craft interactive digital experiences using various tools, including JavaScript. They specialize in digital marketing, web development, and creating visually appealing, functionally robust websites and applications. 

Their portfolio reflects diverse creative projects across multiple industries, showcasing their ability to deliver compelling digital narratives. The multidisciplinary team at Human Design integrates design, technology, and storytelling to help brands effectively engage their audiences.

Infinum

Infinum is a digital agency with a Denver location that specializes in JavaScript technologies such as React and Node.js. They offer a wide array of services, including web development, mobile app development, and product design. 

Infinum has worked with notable clients like Philips and Virgin Mobile, providing innovative solutions that leverage modern frameworks to deliver high-performance digital products tailored to meet the needs of diverse industries.

Gorilla Logic

Gorilla Logic is a Colorado-based software development company that specializes in JavaScript frameworks such as React, Angular, and Node.js. They offer full-stack development services, including web and mobile app development, backend services, and DevOps. 

Gorilla Logic has worked with a range of clients, from startups to Fortune 500 companies, providing custom solutions that leverage modern JavaScript technologies to create scalable, high-performance applications.

Kin + Carta

Kin + Carta, based in Denver, is a global digital transformation consultancy that excels in both JavaScript and Java-based frameworks, including React, Node.js, and other technologies. They offer a comprehensive suite of services from strategic consulting to software development and digital transformation. 

Kin + Carta is known for their data-driven approach and innovative solutions that help businesses navigate complex digital landscapes and drive growth. They serve a wide range of industries, including financial services, healthcare, and industrial sectors, with a portfolio of clients such as Not On The High Street, Matalan, and Natwest.

Cuttlesoft

Cuttlesoft is a Denver-based software development company that provides custom digital solutions, including web and mobile app development, UX/UI design, and cloud integration. They use a variety of technologies, including JavaScript frameworks like React and Angular, as well as Java frameworks such as Spring and Hibernate. 

Cuttlesoft’s versatile skill set allows them to build robust and dynamic applications tailored to specific client needs. They have collaborated with startups and established businesses alike, leveraging their comprehensive technology expertise to deliver effective and scalable solutions.

Thoughtbot

Thoughtbot is a product design and software development consultancy with a location in Denver, specializing in JavaScript frameworks like React and Node.js. They offer a wide range of services, including product design, custom software development, and team augmentation. 

While their primary focus is on JavaScript technologies, they are also capable of working with other technologies as required by specific projects. Thoughtbot has collaborated with a diverse set of clients, from startups to established companies, delivering scalable and user-friendly digital products tailored to meet specific business needs.

Deventry

Devetry is a software development firm located in Denver that specializes in JavaScript technologies, including React and Node.js. They provide a range of services, from web and mobile app development to custom software solutions, helping clients build scalable and modern applications. 

Devetry focuses on using the latest JavaScript frameworks and development practices to deliver high-quality products. While their core expertise is in JavaScript, they may employ additional technologies as needed for specific projects.

Conclusion

When choosing a JavaScript development partner in Colorado, consider factors like experience, expertise in specific frameworks, and a proven track record of delivering successful projects. While all these companies offer outstanding services, Flatirons stands out for its comprehensive range of JavaScript solutions, from mobile app development to backend API creation. 

With a team of expert developers and a commitment to quality, we at Flatirons are ready to help you bring your digital vision to life. Contact us today to learn more about our services and how we can support your next project.