Frontend Engineer

This role fits a Senior or Staff Frontend Engineer with 5–10+ years of experience building high-quality, production UIs using React, TypeScript, and Tailwind CSS. The candidate should have strong expertise in performance optimization, scalable frontend architecture, and creating complex data-heavy dashboards or developer tools with excellent UX. They must be comfortable owning the frontend end-to-end, collaborating with customers, and handling some backend tasks (Node.js, APIs) while working autonomously in a fast-paced, remote startup.

1. How would you design a high-performance data-heavy dashboard in React?
   Use virtualization (e.g., react-window), efficient state management, memoization, and pagination to handle large datasets while keeping rendering fast.

2. What techniques would you use to reduce bundle size in a React + TypeScript application?
   Apply code splitting, dynamic imports, tree shaking, and analyze bundles with tools like Webpack Bundle Analyzer to remove unused code.

3. How does memoization work in React, and when would you use it?
   Memoization caches computed values (useMemo, React.memo) to prevent unnecessary recalculations or re-renders, especially for expensive operations or stable props.

4. How would you architect a scalable component system using Tailwind CSS?
   Create reusable UI primitives, enforce design tokens, and build consistent component patterns while avoiding duplication and maintaining readability.

5. How do you handle real-time updates (e.g., logs or sync status) in a frontend app?
   Use WebSockets or polling, manage state efficiently, and ensure UI updates are batched and optimized to avoid performance bottlenecks.

6. What are common performance pitfalls in React applications?
   Unnecessary re-renders, large component trees, improper key usage, heavy computations in render, and lack of memoization.

7. How would you ensure accessibility (a11y) in a complex frontend application?
   Follow semantic HTML, use ARIA attributes when needed, ensure keyboard navigation, and test with screen readers and accessibility tools.

8. How do you collaborate with backend systems when building integrations-heavy products?
   Define clear API contracts, handle pagination and rate limits, implement retries, and ensure robust error handling for external services.

9. How would you debug a slow or unresponsive UI in production?
   Use performance profiling tools, analyze React DevTools flame charts, inspect network requests, and identify rendering bottlenecks.

10. What strategies would you use to improve developer experience (DX) in a frontend codebase?
    Set up strong linting, clear architecture patterns, reusable components, fast builds, good documentation, and automated testing.

Nango is a YC-backed, fast-growing startup building an AI-powered platform that enables developers to create seamless product integrations, already trusted by 250+ customers like Replit and Ramp. As a Senior/Staff Frontend Engineer, you’ll own and rebuild the entire frontend experience—crafting high-performance, data-heavy dashboards and developer tools using React, TypeScript, and Tailwind CSS, with end-to-end ownership from design to production. This is a fully remote role across North America, LATAM, and Europe, offering $120K–$200K salary plus 0.1%–0.25% equity. Join a small, elite team to shape product direction, work closely with developer users, and build best-in-class UI in a high-impact, ownership-driven environment.