Top Senior Front End Developer Jobs in Denver & Boulder, CO

Lead a team of HMI developers to design and implement high-performance web-based HMI and visualization components. Build front-end applications and APIs integrating backend services, simulations, and digital twin data. Collaborate with cross-functional teams, prototype features, participate in design/code reviews, testing, documentation, and support deployment and operational testing for defense command-and-control systems.

The Staff Frontend Engineer will lead frontend architecture, build high-performance React applications, mentor junior engineers, and collaborate closely with product teams to enhance user experiences.

The Staff Frontend Engineer will lead frontend system development, architect scalable solutions, mentor engineers, and drive best practices while collaborating cross-functionally.

As a Staff Front End Engineer, you will lead the front end vision, drive architecture decisions, and mentor engineers while developing high-impact web applications in a collaborative environment.

Design, build, test, and maintain scalable React/Redux web applications. Implement responsive UIs, integrate with Node.js and REST APIs, write unit tests with JEST, perform code reviews, debug issues, and participate in Agile ceremonies while maintaining project documentation.

Build and own frontend surfaces for trading and DeFi products, designing scalable real-time UIs, improving UX, setting frontend standards, collaborating on SDKs/APIs, and contributing to tooling, testing, and CI/CD.

Design and implement developer-facing UI from Figma to production using Hotwire (Turbo + Stimulus) and ViewComponents. Own the dashboard, API playgrounds, docs, marketing site, and data visualization. Optimize performance and bundle size, maintain a coherent component system, and ship polished, production-ready front-end with tests and CI/CD.

The Frontend Engineer will lead the development of applications using React, focusing on user experience and collaborating with cross-functional teams to improve frontend architecture and address user needs.

Lead the development of front-end architecture for spacecraft modeling software, drive cross-functional initiatives, mentor engineers, and influence product strategy.

The Sr/Staff Frontend Engineer will develop new web applications, enhance UI experiences, architect solutions, and collaborate with various stakeholders to ensure a scalable and secure platform.

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

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

Lead frontend development for native iOS and Android apps using React Native. Turn Figma designs into high-performance screens, ship end-to-end releases to App Store and Google Play, optimize performance and startup time, design architecture and state management, own code quality and reviews, implement rich animations and gestures, integrate APIs and AI features, and maintain analytics, logging, and monitoring.

The role involves designing and building internal web applications for Nebius, focusing on automating data center operations and developing user interfaces for infrastructure management.

Design, develop, and enhance custom SAP Fiori/UI5 applications; configure Fiori Launchpad; integrate OData services; perform UI debugging, performance optimization, code reviews, unit testing, and documentation while collaborating with backend and functional teams.

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.

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.

The UI Frontend Developer will design and develop responsive web applications, coordinate with backend developers, and create modular components, while ensuring high-quality coding standards.

The Sr. Software Engineer, Front End will develop 2D and 3D frontend features, drive architectural direction, mentor junior engineers, and address technical debt under high accountability in a complex simulation environment.

The Lead Front-End Developer will lead frontend initiatives, ensuring an optimal user experience, architecting solutions, and mentoring developers.

Develop and maintain Java backend services for enterprise blockchain applications, integrate APIs with React/Vue frontends, design scalable blockchain solutions, troubleshoot complex backend issues, and collaborate with the team to apply best practices and stay current with blockchain trends.

Design, develop, and deliver front-end enterprise solutions in a consulting environment. Collaborate with designers and clients to convert designs into accessible, responsive, cross-browser implementations, apply front-end patterns and best practices, mentor teammates, and contribute to CI/CD, testing, containerization, and cloud deployment workflows.

Design, build, and maintain scalable frontend applications using Vue 3 and TypeScript. Own feature delivery from design through production, build reusable components and architecture, improve performance and accessibility, collaborate with backend teams on APIs, write tests, mentor engineers, and help shape frontend tooling, CI/CD, observability, and security practices.

The Staff Front End Engineer will lead technical direction, improve app features, mentor engineers, and collaborate with cross-functional teams using React Native.

As a Principal Software Engineer, you will lead frontend development using React and TypeScript, mentor teams, and drive technical excellence in high-impact web applications. Responsibilities include designing scalable systems, optimizing performance, and collaborating with cross-functional teams.