UI/UX JavaScript ES6+ and React.js Developer (536)

Johnson Service Group

San Francisco, CA
3 days ago

$60–$70 Per Hour

Highlights

Johnson Service Group (JSG) is currently looking for a Senior UI/UX JavaScript (ES6+) Developer with extensive React.js and frontend architecture experience. Role combines hands-on frontend development with technical leadership across UI initiatives.

Numbers & Facts

Location	San Francisco, CA
Industry	Staffing/Employment Agencies
Salary	$60–$70 Per Hour
Company Size	1,000 to 1,499 employees
Year Founded	1984
Website	https://www.jsginc.com/

Description

Johnson Service Group (JSG) is currently looking for a Senior UI/UX JavaScript (ES6+) Developer with extensive React.js and frontend architecture experience. This is an opportunity with an enterprise organization to lead frontend architecture, establish UI standards, and deliver scalable, high-performance applications. (Hybrid 3-4 days, San Francisco, Bay Area)
Must Have skills

10+ years frontend development
5+ years working with React.js and frontend architecture
Experience leading UI architecture initiatives
Azure cloud and DevOps experience
Agile development experience
Proficient in TypeScript, JavaScript (ES6+), HTML5, CSS3
Experience with Material UI, Styled Components, Webpack, Storybook
Expertise in state management (Redux, Zustand, Context API)
Experience building enterprise component libraries and design systems
Strong understanding of performance optimization techniques
Experience with large datasets and dashboards
Knowledge of accessibility (WCAG) and security best practices
Experience with testing frameworks like Jest and React Testing Library
Experience with REST API integration
Knowledge of CI/CD pipelines and Docker

Nice to Have skills

Next.js experience
Micro frontend architecture
Data visualization libraries
Financial domain exposure

Responsibilities

Lead the design and development of UI components using React.js.
Define and maintain frontend standards, best practices, and coding guidelines.
Drive the development and adoption of reusable component libraries and design systems.
Architect scalable UI solutions for enterprise applications.
Optimize frontend applications for performance, scalability, and responsiveness.
Lead responsive design and cross-browser compatibility initiatives.
Collaborate closely with backend development and UX teams.
Conduct code and design reviews to maintain quality and architectural consistency.
Mentor developers and provide technical guidance on frontend implementation.
Maintain frontend documentation and UI architecture standards.

Other Information

Bachelors degree in Computer Science or a related field.
Role combines hands-on frontend development with technical leadership across UI initiatives.
Experience leading UI architecture initiatives is preferred.
Relevant React or Azure certifications are preferred.
Pay Range- $60.00-70.00 per hour contract only

Johnson Service Group (JSG) is an Equal Opportunity Employer. JSG provides equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, disability, marital status, protected veteran status, or any other characteristic protected by law.

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About Company

At JSG, We Understand People

It is our mission to empower people, help our clients reach their goals, and hire motivated individuals.

Since our start in 1984, we’ve worked hard to establish our present position as the most effective cross-industry staffing and consulting solution available.

Headquartered in Chicago, IL with local offices throughout the United States and Canada, JSG proudly serves a diverse range of industries with the right solutions to help clients reach their company goals. Our client-centric approach enables us to create personalized solutions for businesses in need of top-tier talent. Our dedication doesn’t stop at our clients. We strive to connect candidates with opportunities that match their skills and goals. More than just a go-between, we are a dependable bridge, uniting top talent with suitable opportunities, facilitating shared opportunities and growth.