> Markdown version of [/jobs/ext/4670312-ui-developer](https://www.wearedevelopers.com/jobs/ext/4670312-ui-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # UI DEVELOPER - **Company:** Robotics Technologies LLC - **Location:** Seattle, WA, United States - **Experience:** Expert - **Salary:** $158,080 - **Contract:** Temporary contract - **Skills:** JavaScript (Programming Language), Component-Based Software Engineering, Application Performance Management, HTML5, Unit Testing, Browser Compatibility, Cascading Style Sheets (CSS), Code Review, Continuous Integration, Software Debugging, JSON, Performance Tuning, Scrum Methodology, Responsive Web Design, TypeScript, Web Applications, Web Application Frameworks, ReactJS, Backend, Git, AngularJS, Front End Software Development, React Redux, Software Coding, Restful APIs, Jenkins - **Published:** November 11, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=124ee63a285b0f25 ## About the Role We are looking for a highly experienced Senior UI Developer with 10+ years of experience in designing and developing responsive, user-friendly web applications. The ideal candidate should have strong expertise in modern frontend technologies, JavaScript frameworks, UI architecture, and performance optimization., * 12+ years of experience in UI / Frontend Development. * Strong expertise in HTML5, CSS3, JavaScript, and TypeScript. * Hands-on experience with React.js or Angular. * Experience with responsive web design and CSS frameworks. * Strong knowledge of REST APIs and JSON. * Experience with Redux, Context API, or NgRx. * Knowledge of UI architecture and reusable component development. * Experience with Git, Jenkins, and CI/CD pipelines. * Strong debugging and problem-solving skills. ## Description * Design, develop, and maintain responsive and scalable web applications. * Build interactive user interfaces using HTML5, CSS3, JavaScript, TypeScript, and React.js or Angular. * Develop reusable UI components and frontend libraries. * Collaborate with UX/UI designers, backend developers, and business teams. * Integrate frontend applications with RESTful APIs and backend services. * Ensure cross-browser compatibility and mobile responsiveness. * Optimize application performance, scalability, and page load times. * Implement state management solutions such as Redux, Context API, or NgRx. * Perform code reviews, debugging, and unit testing. * Follow frontend development best practices and coding standards. * Mentor junior developers and provide technical guidance. * Participate in Agile/Scrum ceremonies and sprint planning.