Contribute as a core individual contributor to a web application, focusing on high-quality user interfaces and leveraging AI tools for development.
Location: Remote (LATAM only)
Engagement: Contractor
Experience: Senior (5+ years)
Timezone: Must overlap with US working hours
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.
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.
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
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)
Pixel-accurate Figma-to-code execution
Strong understanding of responsive and mobile-first UX
Experience with performance optimization, code splitting, lazy loading, and profiling
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)
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
Strong opinions, loosely held
Clean, maintainable, well-tested code
Systematic debugging and ownership of production issues
Good judgment balancing quality and speed
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
Clear written English communication
Comfort working async across time zones
Proactive about blockers and clarifying requirements
Thoughtful, constructive code reviews and mentorship
Comfortable with ambiguity and changing priorities
Move fast without cutting corners
Willing to wear multiple hats when needed
Curious, resourceful, and self-directed
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
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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