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Senior Frontend Engineer (Contractor) at Hauler Hero Inc.. Remote Location: LATAM. Senior Frontend Engineer (Contractor). Location:. Remote (LATAM only). Engagement:. Contractor. Experience:. Senior (5+ years). Timezone:. Must overlap with US working hours. Role Summary. We are hiring a . Senior Frontend Engineer (Contractor). to be a core individual contributor on our web application. This is a . hands-on role (80%+ coding). focused on building high-quality, production-grade user interfaces used daily by haulers and operators in the field.. You will work closely with Product, Design, and Backend Engineering to ship features quickly while maintaining a high bar for quality, performance, and usability. This role requires strong ownership, clear communication, and the ability to operate independently in a remote environment.. AI-First Engineering. We are intentionally building an . AI-assisted engineering organization. . AI tools are part of the daily workflow, not optional.. What this means in practice:. Daily use of tools such as Claude, Claude Code, Cursor, and GitHub Copilot. AI-assisted implementation, refactoring, test generation, and boilerplate. You focus on architecture, UX decisions, edge cases, and quality. You review all AI-generated output with a . trust-but-verify. mindset. This role is . not a fit. for engineers who are resistant to AI-assisted development or who rely on AI output without understanding the code being produced.. Key Responsibilities. Build & Ship. 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. Quality & Craft. 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). Collaborate & Iterate. 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. Shape the Platform. 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. Required Qualifications. Core Stack. 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). Design & Execution. Pixel-accurate Figma-to-code execution. Strong understanding of responsive and mobile-first UX. Experience with performance optimization, code splitting, lazy loading, and profiling. Workflow. Experience working in Agile or Scrum environments. Comfortable with PR-based Git workflows and code reviews. Familiarity with Jira, Slack, Figma, and modern frontend build tools (Vite or Webpack). Nice to Have. Firebase (Auth or Storage). Mapping libraries (Leaflet, Mapbox, Google Maps). GraphQL or REST API integration. Monorepo or micro-frontend experience. B2B SaaS or field-service software experience. What We Look For. Technical Excellence. Strong opinions, loosely held. Clean, maintainable, well-tested code. Systematic debugging and ownership of production issues. Good judgment balancing quality and speed. Ownership Mindset. Ownership of the full feature lifecycle. Proactive problem identification and solutioning. Attention to edge cases, error states, and accessibility. Follow-through until features are stable and shipped. Communication & Collaboration. Clear written English communication. Comfort working async across time zones. Proactive about blockers and clarifying requirements. Thoughtful, constructive code reviews and mentorship. Startup Mindset. Comfortable with ambiguity and changing priorities. Move fast without cutting corners. Willing to wear multiple hats when needed. Curious, resourceful, and self-directed. What Success Looks Like. High-quality UI features shipped consistently. Clean, scalable frontend architecture. Strong test coverage and predictable releases. Minimal rework due to UX or quality issues. Strong trust from Product and Design partners. Contractor & Location Notes. 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