We’re looking for a Senior Frontend Software Engineer to help maintain, modernize, and improve a large portfolio of enterprise React applications that support critical business operations. This remote role offers the chance to work across a broad frontend ecosystem, collaborate with cross-functional partners, and contribute to meaningful modernization efforts in a fast-paced environment.

Responsibilities

• Build, maintain, and enhance enterprise React applications used across multiple business workflows
• Contribute to a micro frontend environment and help support shared frontend capabilities
• Modernize legacy React code by refactoring class-based components into modern patterns
• Improve application performance, maintainability, scalability, and overall user experience
• Address frontend security concerns and support secure development practices
• Strengthen accessibility and usability across applications
• Develop reusable UI components that support consistency and long-term maintainability
• Participate in code reviews, architecture discussions, and ongoing engineering improvements
• Collaborate with backend engineers, UX partners, and product teams to deliver high-quality solutions
• Help promote best practices for frontend development, testing, and continuous improvement

Skills

• Strong hands-on experience with React 18 or newer
• Solid knowledge of React Hooks, Context API, custom hooks, and React Router
• Advanced TypeScript experience, including generics and utility types
• Experience working in large enterprise codebases
• Proven background modernizing and improving existing React applications
• Ability to refactor and simplify complex frontend code
• Experience with state management tools or patterns such as Redux Toolkit, React Query/TanStack Query, or context-based architectures
• Strong testing experience with Jest and React Testing Library
• Knowledge of frontend security practices, dependency management, and vulnerability remediation
• Familiarity with accessible development practices and WCAG principles
• Comfort using ESLint and Prettier to support code quality
• Ability to work independently while collaborating effectively in a remote team

Preferred Skills

• Experience with micro frontend architecture and Module Federation
• Background with shared component libraries and distributed UI systems
• Experience with performance profiling, code splitting, lazy loading, and bundle analysis
• Familiarity with CI/CD pipelines and production support
• Experience integrating with APIs and working in backend-connected frontend environments
• Knowledge of Storybook, Lighthouse, Chrome DevTools, or Web Vitals
• Experience with enterprise design systems and shared dependency management
• Exposure to AI-assisted development tools used responsibly for refactoring, testing, and documentation

Horizontal is committed to fostering a diverse, equitable, and inclusive workplace where different perspectives are valued and respected. We welcome candidates of all backgrounds and encourage applications from individuals who bring unique experiences, ideas, and approaches to the team.

By applying for this position, you acknowledge and agree that Horizontal Talent may contact you regarding your application using automated technology, including phone calls, SMS/text messages, or email, which may be delivered by our virtual AI recruiter, Alex.

Please apply through this online posting or by visiting our Job Board at www.horizontaltalent.com/job-board. Applications will be accepted for 4 weeks. For those that join the team, we offer competitive compensation and benefits including medical, dental, vision, and retirement. Check out all we have to offer and how you can become part of the Horizontal Talent Team. The pay range for this role is $57 - $92 per hour based on qualifications and experience.