Top Front End Developer Jobs in Denver & Boulder, CO

Lead front-end development on a cross-functional team building user-focused UI features. Architect scalable, accessible component-based interfaces, ensure testing and quality, mentor engineers, and own features from inception through delivery.

As a Front-End Engineer, you will build and refine user-facing components, ensuring responsiveness, performance, and user experience through collaboration with UI/UX and backend teams.

The Data Insights Engineer will design and develop high-quality UI solutions, collaborate with teams, and focus on data visualization and user experience.

As a Front End Engineer, you'll build and improve web applications using modern technologies, collaborate on UI design, and utilize AI-driven tools for efficient development.

As a Senior Frontend Engineer, you will build and enhance features for a high-performance observability platform, focusing on user experience and community engagement.

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.

Build and optimize a responsive Vue.js frontend for a customer-service SaaS, collaborate with product and dev teams, handle production support, participate in Agile ceremonies, perform code reviews, and mentor junior developers.

Own front-end development of web applications using React and TypeScript. Build reusable components, collaborate with design/backend/AI teams, integrate APIs, optimize performance and accessibility, and iterate via A/B testing and analytics.

The Senior Staff Frontend Engineer will lead major frontend initiatives, contributing to application architecture, performance, and user experience while collaborating with engineers across the stack.

The Software Engineer (Frontend) at Metabase will develop user-friendly data tools, leveraging React and CSS while ensuring optimal communication and coding practices.

Lead technical direction and contribute to the frontend codebase, building user-facing tools and mentoring team engineers to enhance user experiences.

Design and implement frontend components for the Solidity compiler, optimize performance, develop integration layers, and collaborate with researchers to enhance security features.

The role involves designing, developing, and maintaining scalable web applications, with a focus on UI, testing, and collaboration. It requires strong front-end skills and familiarity with back-end integration.

The Lead Senior Staff Software Engineer leads technical and project initiatives, manages a small team, and enhances the platform's UI framework while ensuring quality and efficiency.

As a Senior Frontend Engineer, you will build and enhance features on various products using React and TypeScript, collaborating with teams to improve UI and software architecture while ensuring performance across devices and browsers.

The Senior Frontend Engineer will lead product development for a hotel marketplace, focusing on creating efficient tools for hotel partners and enhancing guest experiences. Responsibilities include ownership of product quality, roadmap execution, and supporting business-critical outages.

Lead development of interactive React front-ends with Chakra UI and Mapbox, build data visualizations (Plotly/ApexCharts), optimize performance for large and real-time datasets, enforce front-end best practices, mentor engineers, and collaborate with product, design, and backend teams to deliver accessible, responsive interfaces.

Owner of the asset discovery experience across tokens, perpetuals, and prediction markets. Design, build, and scale features for web, mobile, and browser extension platforms. Lead initiatives to add blockchain support and new products, interface with users and developers for feedback, and help grow and hire a high-performing Discovery team.

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.

As a Frontend Engineer, you will develop and enhance user experiences for Wordly's translation services, focusing on UI implementation, testing, and API integration.

As a Staff Frontend Engineer at ClickUp, you will lead complex frontend implementations, influence technical direction, mentor engineers, and enhance application performance across teams.

The role involves designing, building, and implementing new services, working closely with the product team, and taking ownership of projects from 0 to 1.

Design, build, and maintain scalable React/TypeScript web applications for Keeper's Admin Console. Integrate with backend REST APIs, implement enterprise UI workflows (RBAC, policy config, audit views), ensure secure, well-tested frontend code, participate in architecture and code reviews, troubleshoot performance and usability, and maintain documentation.