07 set - Modena
Greymatter Innovationz
Senior Frontend Engineer - (Next/React)
Location: Latinamerica (Remote)
Rate: $3,300 USD as contractor (No benefits)
Duration: FTE
Seniority: 6+ years
Experience Required: 6+ years in frontend development, with 3+ years in React and 2+ years in Next.js
About the Role
We are looking for a Senior Frontend Developer to lead the design and development of scalable, high-performance web applications using React and Next.js. You will own architecture decisions, mentor junior engineers, and drive best practices across the frontend codebase. This role also requires comfort using AI-assisted development tools and evaluating AI-generated output for quality, security, and performance.
Key Responsibilities
Architect, build, and maintain scalable, production-grade applications using React and Next.js (App Router, SSR, SSG, ISR).
Lead technical design discussions and make architecture decisions for component structure, state management, and data flow.
Own performance optimization — Core Web Vitals, bundle size, rendering strategy (CSR vs. SSR vs. SSG), and caching.
Review pull requests with a focus on code quality, scalability, accessibility, and maintainability — including code generated with AI tools.
Use AI coding assistants (GitHub Copilot, Cursor, Claude, ChatGPT, etc.) to accelerate development, while critically reviewing generated code for correctness, security, and adherence to standards.
Collaborate with backend engineers to define and consume REST/GraphQL APIs, including error handling and loading states.
Translate Figma/design system files into reusable, accessible, well-tested components.
Mentor junior and mid-level developers through code reviews, pairing, and technical guidance.
Drive adoption of testing strategy (unit, integration, E2E) using tools like Jest, React Testing Library, Cypress, or Playwright.
Partner with product managers and designers to scope features, estimate effort, and identify technical tradeoffs.
Stay current with the React/Next.js ecosystem
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