INSPYR Solutions · 14 hours ago
Frontend Developer
Northridge, CA
Contract
Onsite
Senior Level
$100/hr - $120/hr
5+ years expINSPYR Solutions is a national expert in delivering flexible technology and talent solutions, and they are seeking a Senior Frontend Engineer to develop and maintain their sophisticated React-based web application. The role involves developing complex applications, ensuring code quality, and collaborating closely with UX/UI designers and backend engineers.
Information TechnologyProfessional ServicesStaffing Agency
Responsibilities
Develop and maintain complex React applications using TypeScript
Build responsive, accessible user interfaces using AWS UI Design System components
Implement state management solutions using Redux Toolkit
Create and maintain reusable component libraries and design patterns
Integrate with multiple backend services through REST APIs and AWS services
Design scalable frontend architectures for enterprise-level applications
Implement authentication and authorization flows using AWS Cognito and Amplify
Build complex data visualization components using libraries like Recharts
Optimize application performance and bundle sizes using Webpack
Establish and maintain coding standards, linting rules, and development workflows
Write comprehensive unit tests using Jest and React Testing Library
Develop and maintain end-to-end tests using both Cypress and Playwright
Design and implement Page Object Model patterns for maintainable E2E tests
Create test fixtures and authentication flows for multi-user scenarios
Implement test-driven development practices
Ensure code quality through automated testing and code reviews
Debug complex issues across multiple browser environments
Set up canary testing and resource-based test grouping strategies
Work closely with UX/UI designers to implement pixel-perfect interfaces
Collaborate with backend engineers to define API contracts and data models
Mentor junior developers and conduct code reviews
Participate in architectural decisions and technical planning sessions
Qualification
Required
Develop and maintain complex React applications using TypeScript
Build responsive, accessible user interfaces using AWS UI Design System components
Implement state management solutions using Redux Toolkit
Create and maintain reusable component libraries and design patterns
Integrate with multiple backend services through REST APIs and AWS services
Design scalable frontend architectures for enterprise-level applications
Implement authentication and authorization flows using AWS Cognito and Amplify
Build complex data visualization components using libraries like Recharts
Optimize application performance and bundle sizes using Webpack
Establish and maintain coding standards, linting rules, and development workflows
Write comprehensive unit tests using Jest and React Testing Library
Develop and maintain end-to-end tests using both Cypress and Playwright
Design and implement Page Object Model patterns for maintainable E2E tests
Create test fixtures and authentication flows for multi-user scenarios
Implement test-driven development practices
Ensure code quality through automated testing and code reviews
Debug complex issues across multiple browser environments
Set up canary testing and resource-based test grouping strategies
Work closely with UX/UI designers to implement pixel-perfect interfaces
Collaborate with backend engineers to define API contracts and data models
Mentor junior developers and conduct code reviews
Participate in architectural decisions and technical planning sessions
React 18+: Advanced proficiency with hooks, context, and modern patterns
TypeScript: Strong typing skills, interface design, and generic programming
Redux Toolkit: State management for complex applications
React Router: Client-side routing and navigation
AWS UI Components: Experience with enterprise design systems
Webpack: Module bundling, optimization, and configuration
Testing: Jest, React Testing Library, Cypress and Playwright for E2E testing
Code Quality: ESLint, Prettier, Husky for pre-commit hooks
Version Control: Advanced Git workflows and branching strategies
Build Tools: npm/yarn, CI/CD pipelines, automated deployments
Browser DevTools: Performance profiling and debugging
AWS Amplify: Authentication, API integration, and deployment
AWS Cognito: User pools, identity management, and JWT handling
AWS CDK: Infrastructure as code (beneficial)
CloudWatch: Monitoring and logging integration
Preferred
5+ years of professional frontend development experience
3+ years working with React in production environments
Experience with enterprise-scale applications serving thousands of users
Background in network operations, telecommunications, or satellite systems (preferred)
Experience with real-time data visualization and monitoring dashboards
Performance optimization techniques for large-scale React applications
Accessibility (WCAG) compliance and inclusive design practices
Cross-browser compatibility and progressive enhancement
Micro-frontend architectures and module federation
GraphQL and advanced API integration patterns
Advanced E2E testing patterns including Page Object Models and test fixtures
Multi-environment testing strategies and canary deployments
AWS Hydra Playwright library integration for enterprise testing
Benefits
Comprehensive medical benefits
Competitive pay
401(k) retirement plan
...and much more!
Company
INSPYR Solutions
INSPYR Solutions is a information technology staffing service providers.
501-1000 employees
H1B Sponsorship
INSPYR Solutions has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (54)
2024 (11)
2023 (2)
Funding
Current Stage
Late StageLeadership Team
Gregg Straus
Executive Vice President & Chief Financial Officer
Michelle Wren
Chief Operating Officer
Recent News
2025-09-12
Company data provided by crunchbase