Senior React Software Engineer

Contract type: B2B, full-time Schedule: Flexible hours Work arrangement: Fully remote Seeking a Frontend Engineer with strong skills in React and NextJS to develop a web portal and enhance a Chrome extension. The role covers building user-facing features, ensuring seamless integration, optimizing performance, and collaborating with cross-functional teams. Responsibilities - Develop and maintain responsive UI components in React/NextJS. - Design and maintain Chrome extension features (Manifest V3, APIs, security best practices). - Integrate with backend services via REST or WebSockets. - Optimize performance through efficient state management and profiling. - Write unit and integration tests; ensure cross-browser compatibility. - Contribute to code reviews, documentation, and agile processes. - Monitor, troubleshoot, and resolve UI, performance, and security issues. - Stay current with React ecosystem and browser extension updates. Required Qualifications - 6+ years of React & NextJS experience with TypeScript. - Strong knowledge of HTML5, CSS3, JavaScript, and modern bundlers. - Experience with state management (Redux, React Query, etc.) and API integration. - Proficiency with testing frameworks (Jest, React Testing Library). - Strong Git skills and familiarity with CI/CD workflows. - Solid understanding of web and extension security practices. - Effective communication and collaboration skills. Preferred Qualifications - UI/UX sensibility with focus on accessibility and usability. - Hands-on Chrome extension development (Manifest V3, APIs). - Familiarity with browser automation, scraping, or OCR. - Experience in performance profiling, CI/CD pipelines, and open-source contributions. - Exposure to other frontend frameworks or hybrid mobile apps.