Mirrai Careers

Senior Frontend Engineer (Contractor)

Hauler Hero Inc.

Eastern Europe Remote Contract Posted 30+ days ago
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SENIOR FRONTEND ENGINEER (CONTRACTOR) Location: Remote — Eastern Europe Engagement: Contractor Experience: Senior, 5+ years Time zone: Must consistently overlap with U.S. working hours ABOUT HAULER HERO Hauler Hero builds the operating system for residential and commercial waste haulers, including dispatch, routing, billing, payments, customer management, reporting, and the driver app that ties field operations together. Our customers are private hauler owners, operators, and municipal waste leaders running essential services every day. Many are still managing their businesses through paper tickets, whiteboards, spreadsheets, disconnected systems, and legacy software. The result is missed revenue, messy routes, limited visibility, and too much time spent fighting fires instead of growing the business. Today, we serve 240+ haulers across the country and are scaling quickly. We are a well-funded, fast-moving vertical SaaS company bringing modern software to an essential industry where the customer need is clear and the opportunity is large. ROLE SUMMARY We are hiring a Senior Frontend Engineer to be a core individual contributor on our web application. This is a hands-on role with 80% or more of the time focused on coding and 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 AND SHIP * Implement pixel-accurate, responsive interfaces from Figma using React, TypeScript, and Material UI * 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 AND CRAFT * Own frontend testing across unit, integration, and end-to-end layers using 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 Material UI components using advanced CSS, including Flexbox, Grid, and CSS variables COLLABORATE AND 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 of experience building production React applications * Strong TypeScript experience or full readiness to adopt it * Deep experience with Material UI version 5 or later * Expert-level experience with Redux Toolkit and RTK Query * Advanced CSS3 skills, including Flexbox, Grid, responsive design, and mobile-first principles * Experience building complex forms with React Hook Form * Hands-on ownership of frontend testing using Jest, React Testing Library, Cypress, or Playwright DESIGN AND 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 pull request-based Git workflows and code reviews * Familiarity with Slack, Figma, and modern frontend build tools such as Vite or Webpack * Strong written English communication * Ability to work independently in a remote environment NICE TO HAVE * Firebase Authentication or Firebase Storage * Mapping libraries such as Leaflet, Mapbox, or 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, and well-tested code * Systematic debugging and ownership of production issues * Good judgment when 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 AND COLLABORATION * Clear written English communication * Comfort working asynchronously across time zones * Proactive communication about blockers and unclear requirements * Thoughtful, constructive code reviews and mentorship STARTUP MINDSET * Comfortable with ambiguity and changing priorities * Able to 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 AND LOCATION NOTES * This is a contractor role, not full-time employment * Senior-level ownership and reliability are expected * This role is open to candidates located in Eastern Europe * Consistent overlap with U.S. working hours is required

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