Senior Front‑End Developer (React & TypeScript)

About the role

We are looking for a Senior Front‑End Developer to join our Sao Paulo office. You will own feature development from concept to delivery, shape the migration to a micro‑frontend architecture, and build a new design system from scratch.

Key responsibilities

• Design scalable, modular, and maintainable frontend architectures using React and TypeScript.
• Lead the migration from a monolith to a micro‑frontend architecture.
• Develop and maintain an internal design system, including component APIs and theming.
• Optimize performance for high‑traffic, data‑intensive applications.
• Implement unit, integration, and end‑to‑end tests and ensure testability of all code.
• Define and enforce coding standards, architectural guidelines, and CI/CD processes.
• Conduct code reviews and mentor junior engineers.
• Collaborate with backend engineers, designers, and product managers.
• Champion AI‑assisted development tools to accelerate delivery.

Required profile

• 5+ years of professional frontend development experience.
• Strong track record designing scalable frontend solutions.
• Ability to work onsite four days a week and overlap with US Mountain Time for at least four hours daily.
• English proficiency at B2 level or higher.

Required skills

• React (hooks, context API, state management with Redux or Recoil)
• TypeScript
• Vite, Webpack, or Next.js build tools
• Material UI and design‑system implementation
• RESTful API integration and BFF patterns
• Testing tools: Vitest, Jest, Mock Service Worker
• CI/CD pipelines and DevOps principles
• AI‑assisted development tools (e.g., GitHub Copilot)