Top Front End Developer Jobs in Denver & Boulder, CO

Senior frontend-focused software engineer responsible for authentication, verification, and fraud experiences across web, mobile, and backend systems. The role owns team goals, designs and delivers highly available systems, collaborates with product and design partners, improves engineering standards, supports operations and on-call efforts, and mentors engineers. Candidates should have strong web application architecture experience, proficiency with React or Vue and JavaScript or TypeScript, and excellent communication skills.

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 frontend development for Coinbase identity experiences including login, signup, OAuth, account security, and multi-factor authentication. Own projects from design through deployment and monitoring, guide Native versus Webview architecture, author technical designs, resolve systemic technical debt, lead on-call and incident response, and mentor engineers.

Lead the architecture and delivery of large-scale React and React Native applications across web and mobile. Establish frontend standards for performance, accessibility, reliability, and maintainability; build shared component libraries and design systems; resolve complex frontend and cross-stack issues; partner with product, design, and backend teams; and mentor engineers while shaping technical strategy across multiple product areas.

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.

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.

Develop and enhance interactive enterprise planning, reporting, and analytics web applications using SAP Analytics Cloud and front-end technologies. Responsibilities include implementing UI/UX components, integrating REST APIs and data formats, improving application performance and scalability, reviewing requirements, documenting changes, participating in code reviews, and collaborating with technical teams. The role supports a federal customer remotely and requires Public Trust clearance and U.S. citizenship.

Develop and support interactive enterprise planning, reporting, and analytics web applications using SAP Analytics Cloud and front-end technologies. Responsibilities include building UI/UX components, reviewing requirements and designs, consuming REST APIs, optimizing performance and scalability, debugging, documenting changes, participating in code reviews, and collaborating with technical teams. The role supports a federal customer remotely and requires Public Trust clearance and U.S. citizenship.

Develop and enhance interactive front-end web applications for the Budget and Spend solution using SAP Analytics Cloud and JavaScript. Responsibilities include building planning and reporting applications, implementing UI/UX components, integrating REST APIs and data formats, improving performance and scalability, documenting changes, conducting code reviews, and collaborating with technical teams.

Develop front-end software and user interfaces supporting Space Systems Command defensive cyber solutions. Responsibilities include React and HTML/CSS development, UI/UX design, wireframes, prototypes, user flows, design systems, troubleshooting, and translating requirements and feedback into user-centered interfaces. The role requires onsite work in Colorado Springs and supports USSF cyber operations.

Develop and support front-end web applications for a Budget and Spend solution using SAP Analytics Cloud and JavaScript. Build interactive planning, reporting, dashboard, and analytics features; review requirements, implement UI/UX components, optimize performance and scalability, consume REST APIs, document changes, participate in code reviews, and collaborate with team members. The remote role supports a Washington, DC customer and requires Public Trust clearance and U.S. citizenship.

Develop and support interactive front-end web applications for the Budget and Spend solution using SAP Analytics Cloud and JavaScript. Build planning and reporting applications, create UI/UX components, integrate REST APIs and data formats, optimize performance and scalability, document changes, review code, and collaborate with technical teams. The role is remote, supports a federal customer, and requires Public Trust clearance and U.S. citizenship.

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.

Develop modern web applications focusing on UI components using React while ensuring performance, accessibility, and cross-browser compatibility.

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.

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.

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.

Architect and develop scalable frontend applications supporting sales and operational workflows. Lead frontend architecture, frameworks, tooling, accessibility, security, testing, performance, and maintainability. Mentor engineers, guide technical roadmaps, lead large projects, collaborate with product, design, backend, and platform teams, and modernize internal platforms. The role also champions pragmatic AI-assisted development and supports early-stage product evolution in a complex transactional domain.

Design, build, and deliver front-end features with strong UX focus. Own technical design, coding, testing, deployment, and monitoring in a continuous delivery, microservices environment. Collaborate with Product, implement automated QA practices, and contribute to production deployments while practicing robust testing methodologies.

Build full-stack Django applications with a frontend focus, creating intuitive, interactive, and performant data visualizations for complex healthcare pricing data. Collaborate with product and engineering teams to define user experiences, prioritize features, write scalable code, test and debug systems, improve existing functionality, and translate user requirements into technical solutions.

Lead frontend architecture and implementation for Slate's digital customer experience. Drive design, code, testing, and delivery across web and mobile, mentor engineers, collaborate with UX/product, and make long-term technical trade-offs to ensure reliability and scalability.

Build and maintain responsive, accessible CraftCMS and CraftCommerce sites for B2B manufacturers. Develop catalog and commerce features, forms, transactional emails, third-party integrations, and custom CKEditor elements. Translate Figma designs into Twig and Tailwind CSS implementations using JavaScript, AlpineJS, and Vue. Collaborate with backend developers, project managers, and strategists while using Git, Bitbucket, DDEV, and structured testing and release environments.

Build and scale front-end experiences for Alteryx AI products using React, TypeScript, and micro frontend architecture. Develop reusable UI components, integrate backend services and AI workflows, improve accessibility, performance, testing, and reliability, and guide technical direction. Collaborate across Product, Design, Backend, and Platform teams while mentoring engineers and driving modernization, architecture, and developer experience improvements.

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 frontend engineering initiatives for Grafana’s DataViz squad, from problem framing through rollout and measurement. Build and improve visualization features using TypeScript, React, uPlot, and eCharts; mentor engineers; contribute to design reviews and technical proposals; participate in on-call and incident response; support customer escalations; and collaborate across squads. The role also emphasizes open-source contribution, observability expertise, pragmatic AI-assisted development, and effective remote communication.