Top Front End Developer Jobs in Denver & Boulder, CO

Develop and implement advanced UI applications for defense intelligence using TypeScript and React, mentoring junior engineers and collaborating with cross-functional teams.

Youtopia Marketplace seeks a Senior Front-End Engineer to develop high-performance UIs using Angular and Ionic for a 6-month contract, focusing on user experience and mobile application engineering.

Build and ship performant, accessible subscription and billing UIs. Implement plan selection, checkout, and billing management features using React/TypeScript, ensuring maintainable, tested, and high-quality front-end code. Collaborate with product, design, and cross-functional teams to improve monetization, conversion, and retention.

Lead architecture and build high-performance React 19 applications using TypeScript and modern patterns. Define design-system-driven components, optimize front-end performance, mentor teams, drive technical direction, and collaborate across product, design, and customers to deliver scalable enterprise UIs.

Contribute to the development of web-based frontend space ground system software, collaborating with teams and ensuring code quality through testing and reviews.

As a Staff Engineer in the Prime UI Platform Team, you'll design core systems for frontend experiences, focusing on reliability and performance. You'll lead architecture decisions, develop APIs, optimize data streams, and enhance developer tools while collaborating with frontend engineers and product teams.

The Front-End Software Engineer will develop and deliver software solutions, focusing on web-based command-and-control systems and training capabilities for defense applications.

Lead the frontend technical direction for spacecraft modeling and simulation software, driving strategic initiatives, mentoring engineers, and shaping product direction.

Lead frontend architecture for menu management workflows, developing scalable UI, collaborating with teams, and mentoring engineers while ensuring system reliability.

As a Senior Frontend Engineer at Zapier, you'll design and develop complex UIs, lead feature delivery, and integrate AI into products while collaborating with cross-functional teams.

As a Front-End Developer Intern, you will design and build web applications, collaborate with teams, participate in code reviews, and maintain code quality.

The Product Frontend Engineer will design and build scalable applications, collaborate with teams, and enhance frontend quality using AI tools.

As a Frontend Engineer, you'll develop and maintain frontend features, collaborate cross-functionally, and implement best practices in a dynamic coding environment.

Develop and integrate front-end components for online GIS applications, ensuring effective user experiences while collaborating with cross-functional teams to meet national security needs.

As an Intermediate Front End Engineer, you'll collaborate with designers and engineers to develop user-focused features, maintain core products, and ensure code quality and security.

Build and own interactive frontend features using React and TypeScript, partner with design and backend/AI teams, write testable code, improve frontend architecture, and contribute to shared components and best practices.

As a Lead Frontend Engineer, you will shape the frontend architecture, lead a team of engineers, and ensure high standards of quality and speed for an AI-driven product.

The Product Frontend Engineer will design and build AI-driven applications, collaborate with teams, and ensure code quality and performance.

Lead architecture and development of front-end features for the Risk Cloud platform using Angular and TypeScript. Write and review tests and code, collaborate with product, design, QA, and engineering teams using Agile practices, and optimize the front-end for speed, reliability, and scalability while promoting testing-first and iterative delivery.

The Frontend Engineer will collaborate with design and product teams to create responsive user interfaces, write maintainable code, and optimize performance for a financial platform.

Design user interfaces and workflows in Figma, implement designs using Vue.js and Next.js, and collaborate with backend engineers on API integration.

As a Lead Front-End Engineer, you'll own UI architecture, mentor team members, manage technical initiatives, and drive AI-powered feature development.

Develop and optimize front-end applications using React, collaborate with cross-functional teams, and implement best coding practices for UI components.

Lead architecture and implementation of a new frontend platform, define org-wide frontend best practices, mentor engineers, collaborate with product/design/backend, operationalize tools and CI/CD, drive cross-team initiatives, and ensure high-performance, maintainable, and accessible frontend systems.

The developer will build and maintain scalable storefront features using Shopify Hydrogen, React, and TypeScript, collaborate with teams, and optimize performance.