Top Front End Developer Jobs in Denver & Boulder, CO

Build and own complex frontend features using Vue 3 and TypeScript while developing the Python services and APIs that power them. Improve performance, accessibility, testing, CI/CD, and observability; collaborate with product and design; mentor engineers and apply AI-assisted development tools responsibly to accelerate productivity and maintain quality and security.

Own end-to-end frontend development for core crypto payment flows across web and mobile. Improve latency, availability, and SLOs; build user-facing features (contacts, real-time transaction status); identify and fix performance bottlenecks; partner with product/design/backend; mentor junior engineers to reduce customer friction at scale.

Lead architecture and delivery of large-scale React and React Native frontends. Define frontend strategy and best practices, build shared component libraries and design systems, optimize performance and accessibility, collaborate with product/design/backend teams, mentor junior engineers, and resolve complex frontend and cross-stack issues.

Lead front-end development of secure, mission-critical GUIs using TypeScript/Vue and Node.js. Contribute production code, review peers, maintain CI/CD, tests, and UI components, coordinate with UX, produce documentation, and work on-site in Colorado Springs. Requires security clearance.

Lead a team to develop user interfaces for mission-critical solutions. Responsibilities include code contributions, guidance, task assignments, and maintaining CI/CD pipelines.

Build and ship polished, accessible, high-performance front-end features for Deepgram's Console and Playground. Partner with product and design to translate ideas into incremental releases, improve internal tools, and uphold front-end engineering standards through code reviews and design discussions.

Build and own end-to-end full-stack systems for AI-powered agentic trading across web and React Native mobile. Implement real-time, low-latency UIs and Go backend services, integrate streaming AI/ML features and market data, drive architecture and code quality, and collaborate with AI/ML, design, and product teams to ship production-ready features used by millions.

Lead frontend-leaning full-stack implementation work for carrier and enterprise integrations: architect reusable UI and API layers, author RFCs, guide technical delivery, enforce testing and security best practices, and partner with cross-functional teams to scope and ship production integrations.

Design, build, and deploy modern frontend web interfaces using HTML5/CSS3, JavaScript frameworks, and responsive design. Consume RESTful APIs, ensure Section 508 accessibility, work in agile/SAFe teams, use Git/GitHub, create views in full-stack frameworks, and support CI/CD and containerization practices. Mentor peers and rapidly learn new tools.

Senior frontend engineer responsible for building responsive, accessible web interfaces using modern HTML/CSS/JavaScript frameworks, consuming RESTful APIs, working in agile teams, and supporting CI/CD and containerization workflows.

This role involves leading web platform initiatives, mentoring senior engineers, architecting web applications, and implementing technical strategies for improved performance.

Architect and build a high-performance, low-latency trading web platform. Integrate real-time market data and execution workflows, collaborate cross-functionally on large initiatives, and deliver scalable, performant, user-focused frontend applications with strong attention to API design, tooling, and developer experience.

Lead front-end technical strategy for Coinbase Advanced trading platform: define and execute a scalable roadmap, deliver a low-latency interface across web and mobile, mentor engineers, anchor complex projects, and ensure high standards for code quality and system design.

Build and own end-to-end frontend experiences for Coinbase card products across web and mobile. Ship high-scale consumer features, improve payment flow performance and SLOs, reduce latency and CX contacts, mentor engineers, and collaborate with product, design, and backend teams to deliver reliable, user-focused card functionality.

Build high-performance, responsive, and accessible frontend applications across e-commerce, B2B, and internal tools using Next.js, React, and TypeScript. Implement design-system components, optimize Core Web Vitals, add animations, support A/B testing, collaborate in a monorepo with backend teams, and design interfaces for AI agents with real-time streaming and error handling.

Build and maintain responsive, accessible front-end interfaces using React, React Native, HTML, CSS, and Shopify. Apply UX/UI principles, collaborate with designers and multidisciplinary teams, provide clear technical feedback, and independently deliver high-quality work on complex technology or AI-related projects. Contractors complete output-based tasks and must meet weekly minimum submission requirements, with an expected start within 24–48 hours of onboarding.

Volunteer Principal Front End Developer to build React/React Native web and mobile features, mentor engineers, implement scalable full‑stack solutions, ensure cross‑browser compatibility and testing, work with Node/MongoDB/AWS, attend weekly standups, and support a fundraising launch. Minimum 4 hours/week commitment.

3-month contract Frontend Engineer to build client-facing UIs and integrations for cybersecurity use cases. Collaborate with product, design, and engineering to deliver secure, performant, scalable features, maintain component libraries and automated tests. Remote (GMT+8) role focused on TypeScript and modern web tooling.

Own frontend features from concept through launch and iteration. Build web and mobile applications for a wallet-as-a-service platform, develop SDKs and integration tools, and create secure, intuitive fintech-grade user experiences. Collaborate with Product and Design, write documentation, review code, and maintain high standards for architecture, performance, and security.

Lead frontend development for a DeFi platform, owning React and TypeScript architecture, Solana integrations, transaction flows, real-time blockchain data, and high-performance user experiences. Collaborate with product, design, and backend teams to deliver features, establish engineering standards, review code, and mentor future frontend hires. The role requires production frontend expertise, deep Solana knowledge, and leadership of projects or teams.

Design and build a scalable, responsive UI; lead frontend architecture and optimization; apply UI/UX best practices; integrate with backend APIs; ensure high web performance and deploy user-facing features.

Lead the strategic direction of frontend engineering, architecture, tooling, and standards. Build accessible, high-performing React or Angular applications, component libraries, design systems, deployment pipelines, and testing strategies. Drive modernization, performance, accessibility, and developer-experience initiatives while collaborating with product and design teams. Mentor engineers, influence cross-team technical decisions, and contribute across the full stack when needed. The role is remote, requires U.S. citizenship and the ability to obtain Public Trust 6C, and involves up to 10% travel.

Build and maintain responsive, accessible React/NextJS web interfaces and support Chrome extension development (Manifest V3). Integrate with backend APIs or WebSockets, optimize performance, write tests, perform code reviews, monitor and document extension and web app behavior, and collaborate with cross-functional teams.

Build, test, and optimize responsive web applications using Next.js and React. Collaborate with designers and back-end developers, implement UI/UX designs, write clean maintainable code, and debug front-end issues to ensure high performance across devices and browsers.

Design, develop, and optimize mission-focused web user interfaces and COP dashboards. Create data visualizations, reusable components, and user-centered workflows. Conduct usability testing, integrate real-time operational data, and collaborate with operators, engineers, and DevSecOps to ensure effective situational awareness and mission execution.