Senior Frontend Engineer (Contractor)

Accountabilities
Design, develop, and deliver responsive, pixel-perfect user interfaces using React, TypeScript, and Material UI. Own frontend features from design handoff through implementation, testing, deployment, and continuous improvement. Build complex, validated forms and deliver seamless user experiences across desktop, tablet, and mobile devices. Develop and maintain automated unit, integration, and end-to-end tests to ensure application reliability. Optimize frontend performance, accessibility, responsiveness, and Core Web Vitals. Collaborate closely with product managers, designers, and backend engineers to deliver high-quality features. Participate in code reviews, mentor other engineers, and contribute to frontend best practices and architecture decisions. Utilize AI-assisted development tools responsibly to improve productivity while reviewing and validating generated code. Help evolve the frontend technology stack, component library, design system, and TypeScript adoption. Requirements Minimum 5 years of professional experience building production-grade React applications. Strong expertise in TypeScript, React, Material UI (v5+), Redux Toolkit, and RTK Query. Advanced knowledge of modern CSS, including Flexbox, Grid, responsive design, and mobile-first development principles. Experience developing complex forms with React Hook Form. Proven experience with frontend testing using Jest, React Testing Library, Cypress, Playwright, or similar frameworks. Strong understanding of performance optimization techniques, including lazy loading, code splitting, and application profiling. Experience working from Figma designs and delivering pixel-perfect implementations. Familiarity with Agile development practices, Git-based workflows, and modern frontend build tools such as Vite or Webpack. Comfortable using AI-assisted development tools such as Claude, Claude Code, Cursor, or GitHub Copilot within daily engineering workflows. Excellent written English communication skills and the ability to work independently in a remote, asynchronous environment. Availability to consistently overlap with U.S. business hours. Experience with Firebase, GraphQL, REST APIs, mapping libraries, micro-frontends, or B2B SaaS products is considered an advantage. Benefits Fully remote contractor opportunity based in Europe. High level of ownership with end-to-end responsibility for frontend feature development. Opportunity to work on a modern SaaS platform serving mission-critical business operations. Collaborative environment with close interaction across engineering, product, and design teams. AI-first engineering culture leveraging cutting-edge development tools. Opportunity to influence frontend architecture, engineering standards, and design systems. Flexible remote work within a distributed international team. Exposure to challenging technical projects with opportunities for continuous professional growth.

How Jobgether works:
We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team.
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