Senior UI Engineer — React/Angular, Scalable Web Apps

MACHINE LEARNING TECHNOLOGIES LLC; Seattle (WA); On-site; USD 86,000 - 123,000; Full time

Job summary

Machine Learning Technologies LLC in Seattle seeks a highly experienced Senior UI Developer to design and build responsive, scalable web applications. You will lead frontend work across HTML5, CSS3, JavaScript/TypeScript and frameworks such as React.js or Angular, delivering polished interfaces and robust components.

The role collaborates with UX/UI designers and backend teams in a fast-paced Agile environment.

Qualifications

• 12+ years of UI/frontend development experience.
• Proficient with HTML5, CSS3, JavaScript, TypeScript.
• Hands-on with React.js or Angular frameworks.
• Experience building responsive web apps and UI components.
• Proficient with REST APIs and JSON.
• Familiar with Redux, Context API or NgRx.
• Experience with Git, Jenkins, and CI/CD pipelines.
• Strong debugging and problem-solving skills.

Responsibilities

• Design, develop, and maintain responsive and scalable web applications.
• Build interactive UIs 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.

Skills

HTML5

CSS3

JavaScript

TypeScript

React

Angular

Redux

Context API

NgRx

REST APIs

CI/CD

Tools

Git

Jenkins

Job description

Machine Learning Technologies LLC in Seattle seeks a highly experienced Senior UI Developer to design and build responsive, scalable web applications. You will lead frontend work across HTML5, CSS3, JavaScript/TypeScript and frameworks such as React.js or Angular, delivering polished interfaces and robust components.

The role collaborates with UX/UI designers and backend teams in a fast-paced Agile environment.