Top Front End Developer Jobs in Denver & Boulder, CO

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.

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.

Develop and maintain engaging web and mobile applications using Ionic and Angular. Collaborate on front-end requirements and ensure high-quality, maintainable code while mentoring junior engineers.

Develop and maintain responsive web and mobile applications using Ionic and Angular. Collaborate with teams, integrate APIs, and optimize UI components.

The role involves leading the frontend platform's evolution, architecting user interfaces, partnering with backend developers, and overseeing testing standards and CI/CD infrastructure.

Lead the evolution of the frontend platform, design complex user interfaces, provide technical leadership, and optimize CI/CD infrastructure for a scalable experience.

As a Frontend Software Engineer II, you'll develop scalable UI experiences using React and Remix, optimize GraphQL infrastructure, implement tests, and collaborate closely with cross-functional teams.

The Senior Software Engineer will design and implement web applications using React and Typescript, ensuring security and scalability while participating in Agile processes.

Build sophisticated user interfaces for AI and blockchain interactions, including monitoring tools and decentralized application interfaces, while collaborating across teams for seamless user experience.

Seeking a Senior Software Engineer to build consumer-facing applications using React and React Native, influencing the technical roadmap and ensuring high-quality user experiences across platforms.

Develop and deliver high-quality front-end software for freight logistics. Lead design, mentor junior engineers, and enhance customer experiences using modern frameworks.

Senior Front-End Vue Developer focused on building and maintaining Vue.js applications, collaborating with teams, optimizing performance, and mentoring others.

Develop and maintain websites, drive UI/UX, ensure usability and performance, troubleshoot issues, and collaborate with the team.

Lead the frontend platform's evolution, architect complex UIs, mentor engineers, and drive performance and testing excellence while collaborating with cross-functional teams.

Develop innovative UI and web systems, managing project priorities and deadlines while working within a collaborative team environment.

The Front End Developer will build web applications using React, work with RESTful services, and handle authentication using SAML or JWT while collaborating in an agile environment.

Design, build, and optimize high-performance TypeScript and React single-page applications, mentor team members, and advocate modern frontend practices while collaborating with cross-functional teams.

Build front-end features for Backpack Exchange, optimize performance, and manage projects from start to finish with a focus on React.

As a Front-End Engineer at WhatConverts, you'll develop and optimize web pages, collaborate with UX designers, and maintain the user interface for the Marketing site, focusing on user experience and performance.

Lead frontend projects, collaborate with teams, simplify tech stack, ensure monitoring systems, and maintain user-friendly interfaces.

The Senior Front-End Engineer will architect financial products, lead design discussions, mentor team members, and ensure high-quality application delivery.

As a Frontend Developer, you will develop complex web applications, refactor legacy code, and collaborate on UI/UX while integrating APIs and maintaining component libraries.

As a Staff Frontend Engineer, you will develop the Aerospike Cloud Platform, optimize front-end services, and mentor other developers while ensuring quality code and performance.