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Senior Frontend Engineer – Contractor
Location
Latin America
Posted
101 days ago
Salary
0
Seniority
Senior
Job Description
Senior Frontend Engineer – Contractor
Hauler Hero
• Implement pixel-accurate, responsive interfaces from Figma using React, TypeScript, and Material-UI (MUI) • Own features end-to-end from design handoff through implementation, testing, deployment, and iteration • Build complex, validated forms using React Hook Form • Ensure mobile-first UX, including tablet-first workflows used in the field • Own frontend testing across unit, integration, and e2e layers (Jest, React Testing Library, Cypress or Playwright) • Drive frontend quality standards and best practices • Optimize performance including bundle size, render performance, and Core Web Vitals • Extend and customize MUI components using advanced CSS (Flexbox, Grid, CSS variables) • Work closely with Product, Design, and Backend Engineering • Participate in code reviews and mentor junior engineers • Ship MVPs quickly and iterate based on customer feedback • Communicate clearly in an async-first environment using Slack, Notion, and Loom • Help define component patterns and frontend architecture • Influence and support the transition from JavaScript to TypeScript • Contribute to the evolution of the design system • Identify and address technical debt pragmatically
Job Requirements
- 5+ years building production React applications
- Strong TypeScript experience or full readiness to adopt it
- Deep experience with Material-UI (v5+)
- Expert-level use of Redux Toolkit and RTK Query
- Advanced CSS3 including Flexbox, Grid, responsive design, and mobile-first principles
- Experience building complex forms with React Hook Form
- Hands-on ownership of frontend testing (Jest, RTL, Cypress or Playwright)
Benefits
- This is a contractor role, not full-time employment
- Candidates must be based in LATAM
- Senior-level ownership and reliability are expected
- Consistent overlap with US working hours is required
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